* [PATCH 1/2] block: propagate error code from block_get
@ 2012-05-30 5:31 Sascha Hauer
2012-05-30 5:31 ` [PATCH 2/2] block: do not BUG() on failed block_get Sascha Hauer
2012-05-31 12:45 ` [PATCH 1/2] block: propagate error code from block_get Roberto Nibali
0 siblings, 2 replies; 4+ messages in thread
From: Sascha Hauer @ 2012-05-30 5:31 UTC (permalink / raw)
To: barebox
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
common/block.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/common/block.c b/common/block.c
index 4253fc4..437dc95 100644
--- a/common/block.c
+++ b/common/block.c
@@ -161,7 +161,7 @@ static void *block_get(struct block_device *blk, int block)
int ret;
if (block >= blk->num_blocks)
- return NULL;
+ return ERR_PTR(-ENXIO);
outdata = block_get_cached(blk, block);
if (outdata)
@@ -169,7 +169,7 @@ static void *block_get(struct block_device *blk, int block)
ret = block_cache(blk, block);
if (ret)
- return NULL;
+ return ERR_PTR(ret);
outdata = block_get_cached(blk, block);
if (!outdata)
@@ -191,8 +191,8 @@ static ssize_t block_read(struct cdev *cdev, void *buf, size_t count,
size_t now = BLOCKSIZE(blk) - (offset & mask);
void *iobuf = block_get(blk, block);
- if (!iobuf)
- return -EIO;
+ if (IS_ERR(iobuf))
+ return PTR_ERR(iobuf);
now = min(count, now);
@@ -207,8 +207,8 @@ static ssize_t block_read(struct cdev *cdev, void *buf, size_t count,
while (blocks) {
void *iobuf = block_get(blk, block);
- if (!iobuf)
- return -EIO;
+ if (IS_ERR(iobuf))
+ return PTR_ERR(iobuf);
memcpy(buf, iobuf, BLOCKSIZE(blk));
buf += BLOCKSIZE(blk);
@@ -220,8 +220,8 @@ static ssize_t block_read(struct cdev *cdev, void *buf, size_t count,
if (count) {
void *iobuf = block_get(blk, block);
- if (!iobuf)
- return -EIO;
+ if (IS_ERR(iobuf))
+ return PTR_ERR(iobuf);
memcpy(buf, iobuf, count);
}
@@ -244,7 +244,7 @@ static int block_put(struct block_device *blk, const void *buf, int block)
return -EINVAL;
data = block_get(blk, block);
- if (!data)
+ if (IS_ERR(data))
BUG();
memcpy(data, buf, 1 << blk->blockbits);
@@ -270,8 +270,8 @@ static ssize_t block_write(struct cdev *cdev, const void *buf, size_t count,
now = min(count, now);
- if (!iobuf)
- return -EIO;
+ if (IS_ERR(iobuf))
+ return PTR_ERR(iobuf);
memcpy(iobuf + (offset & mask), buf, now);
ret = block_put(blk, iobuf, block);
@@ -299,8 +299,8 @@ static ssize_t block_write(struct cdev *cdev, const void *buf, size_t count,
if (count) {
void *iobuf = block_get(blk, block);
- if (!iobuf)
- return -EIO;
+ if (IS_ERR(iobuf))
+ return PTR_ERR(iobuf);
memcpy(iobuf, buf, count);
ret = block_put(blk, iobuf, block);
--
1.7.10
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^ permalink raw reply [flat|nested] 4+ messages in thread* [PATCH 2/2] block: do not BUG() on failed block_get
2012-05-30 5:31 [PATCH 1/2] block: propagate error code from block_get Sascha Hauer
@ 2012-05-30 5:31 ` Sascha Hauer
2012-05-31 12:46 ` Roberto Nibali
2012-05-31 12:45 ` [PATCH 1/2] block: propagate error code from block_get Roberto Nibali
1 sibling, 1 reply; 4+ messages in thread
From: Sascha Hauer @ 2012-05-30 5:31 UTC (permalink / raw)
To: barebox
It does not necessarily means a bug when block_get fails here,
this can also be a failure on the underlying device.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
common/block.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/common/block.c b/common/block.c
index 437dc95..5983171 100644
--- a/common/block.c
+++ b/common/block.c
@@ -245,7 +245,7 @@ static int block_put(struct block_device *blk, const void *buf, int block)
data = block_get(blk, block);
if (IS_ERR(data))
- BUG();
+ return PTR_ERR(data);
memcpy(data, buf, 1 << blk->blockbits);
--
1.7.10
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] block: do not BUG() on failed block_get
2012-05-30 5:31 ` [PATCH 2/2] block: do not BUG() on failed block_get Sascha Hauer
@ 2012-05-31 12:46 ` Roberto Nibali
0 siblings, 0 replies; 4+ messages in thread
From: Roberto Nibali @ 2012-05-31 12:46 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
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Hi
On Wed, May 30, 2012 at 7:31 AM, Sascha Hauer <s.hauer@pengutronix.de>wrote:
> It does not necessarily means a bug when block_get fails here,
> this can also be a failure on the underlying device.
>
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
> common/block.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/common/block.c b/common/block.c
> index 437dc95..5983171 100644
> --- a/common/block.c
> +++ b/common/block.c
> @@ -245,7 +245,7 @@ static int block_put(struct block_device *blk, const
> void *buf, int block)
>
> data = block_get(blk, block);
> if (IS_ERR(data))
> - BUG();
> + return PTR_ERR(data);
>
> memcpy(data, buf, 1 << blk->blockbits);
>
> --
> 1.7.10
>
>
Tested-by: Roberto Nibali <rnibali@gmail.com>
Acked-by: Roberto Nibali <rnibali@gmail.com>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 1/2] block: propagate error code from block_get
2012-05-30 5:31 [PATCH 1/2] block: propagate error code from block_get Sascha Hauer
2012-05-30 5:31 ` [PATCH 2/2] block: do not BUG() on failed block_get Sascha Hauer
@ 2012-05-31 12:45 ` Roberto Nibali
1 sibling, 0 replies; 4+ messages in thread
From: Roberto Nibali @ 2012-05-31 12:45 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
[-- Attachment #1.1: Type: text/plain, Size: 3680 bytes --]
Hi Sascha
On Wed, May 30, 2012 at 7:31 AM, Sascha Hauer <s.hauer@pengutronix.de>wrote:
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
> common/block.c | 26 +++++++++++++-------------
> 1 file changed, 13 insertions(+), 13 deletions(-)
>
> diff --git a/common/block.c b/common/block.c
> index 4253fc4..437dc95 100644
> --- a/common/block.c
> +++ b/common/block.c
> @@ -161,7 +161,7 @@ static void *block_get(struct block_device *blk, int
> block)
> int ret;
>
> if (block >= blk->num_blocks)
> - return NULL;
> + return ERR_PTR(-ENXIO);
>
> outdata = block_get_cached(blk, block);
> if (outdata)
> @@ -169,7 +169,7 @@ static void *block_get(struct block_device *blk, int
> block)
>
> ret = block_cache(blk, block);
> if (ret)
> - return NULL;
> + return ERR_PTR(ret);
>
> outdata = block_get_cached(blk, block);
> if (!outdata)
> @@ -191,8 +191,8 @@ static ssize_t block_read(struct cdev *cdev, void
> *buf, size_t count,
> size_t now = BLOCKSIZE(blk) - (offset & mask);
> void *iobuf = block_get(blk, block);
>
> - if (!iobuf)
> - return -EIO;
> + if (IS_ERR(iobuf))
> + return PTR_ERR(iobuf);
>
> now = min(count, now);
>
> @@ -207,8 +207,8 @@ static ssize_t block_read(struct cdev *cdev, void
> *buf, size_t count,
> while (blocks) {
> void *iobuf = block_get(blk, block);
>
> - if (!iobuf)
> - return -EIO;
> + if (IS_ERR(iobuf))
> + return PTR_ERR(iobuf);
>
> memcpy(buf, iobuf, BLOCKSIZE(blk));
> buf += BLOCKSIZE(blk);
> @@ -220,8 +220,8 @@ static ssize_t block_read(struct cdev *cdev, void
> *buf, size_t count,
> if (count) {
> void *iobuf = block_get(blk, block);
>
> - if (!iobuf)
> - return -EIO;
> + if (IS_ERR(iobuf))
> + return PTR_ERR(iobuf);
>
> memcpy(buf, iobuf, count);
> }
> @@ -244,7 +244,7 @@ static int block_put(struct block_device *blk, const
> void *buf, int block)
> return -EINVAL;
>
> data = block_get(blk, block);
> - if (!data)
> + if (IS_ERR(data))
> BUG();
>
> memcpy(data, buf, 1 << blk->blockbits);
> @@ -270,8 +270,8 @@ static ssize_t block_write(struct cdev *cdev, const
> void *buf, size_t count,
>
> now = min(count, now);
>
> - if (!iobuf)
> - return -EIO;
> + if (IS_ERR(iobuf))
> + return PTR_ERR(iobuf);
>
> memcpy(iobuf + (offset & mask), buf, now);
> ret = block_put(blk, iobuf, block);
> @@ -299,8 +299,8 @@ static ssize_t block_write(struct cdev *cdev, const
> void *buf, size_t count,
> if (count) {
> void *iobuf = block_get(blk, block);
>
> - if (!iobuf)
> - return -EIO;
> + if (IS_ERR(iobuf))
> + return PTR_ERR(iobuf);
>
> memcpy(iobuf, buf, count);
> ret = block_put(blk, iobuf, block);
> --
> 1.7.10
>
>
Compile and run-time tested; results in a proper error message propagated
by the block layer:
imx-esdhc@imx-esdhc0: timeout 1
mci@mci0: Reading block 2560 failed with -110
block_cache: blk->ops->read returned -110
Therefore:
Tested-by: Roberto Nibali <rnibali@gmail.com>
Acked-by: Roberto Nibali <rnibali@gmail.com>
Cheers
Roberto
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2012-05-30 5:31 [PATCH 1/2] block: propagate error code from block_get Sascha Hauer
2012-05-30 5:31 ` [PATCH 2/2] block: do not BUG() on failed block_get Sascha Hauer
2012-05-31 12:46 ` Roberto Nibali
2012-05-31 12:45 ` [PATCH 1/2] block: propagate error code from block_get Roberto Nibali
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