[PATCH v2 1/2] ARM: i.MX8M: bootrom-cmd: clean up pointer casting

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

At first glance:

	const u32 *rom_log_addr;
	kstrtoul(optarg, 0, (ulong *)&rom_log_addr) with

looks like it would conflate u32/ulong. While the code is fine,
it is better to just use the correct types and forego the case.

While at it, let's guard against the ROM log pointer being NULL
as well.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
v1 -> v2:
  - new patch
---
 arch/arm/mach-imx/bootrom-cmd.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-imx/bootrom-cmd.c b/arch/arm/mach-imx/bootrom-cmd.c
index 0238d09b169f..63197e02ae2c 100644
--- a/arch/arm/mach-imx/bootrom-cmd.c
+++ b/arch/arm/mach-imx/bootrom-cmd.c
@@ -51,6 +51,9 @@ static int imx8m_bootrom_decode_log(const u32 *rom_log)
 {
 	int i;
 
+	if (!rom_log)
+		return -ENODATA;
+
 	for (i = 0; i < 128; i++) {
 		u8 event_id = FIELD_GET(ROM_EVENT_FORMAT_V1_ID, rom_log[i]);
 		u8 event_id_idx = FIELD_GET(ROM_EVENT_FORMAT_V1_ID_IDX, rom_log[i]);
@@ -178,18 +181,19 @@ static int imx8m_bootrom_decode_log(const u32 *rom_log)
 
 static int do_bootrom(int argc, char *argv[])
 {
-	const struct imx_scratch_space *scratch = arm_mem_scratch_get();
-	const u32 *rom_log_addr = scratch->bootrom_log;
+	union {
+		const u32 *ptr;
+		ulong addr;
+	} rom_log = { NULL };
 	bool log = false;
 	int ret, opt;
 
 	while((opt = getopt(argc, argv, "la:")) > 0) {
 		switch(opt) {
 		case 'a':
-			ret = kstrtoul(optarg, 0, (ulong *)&rom_log_addr);
+			ret = kstrtoul(optarg, 0, &rom_log.addr);
 			if (ret)
 				return ret;
-			rom_log_addr = (const u32 *)rom_log_addr;
 		case 'l':
 			log = true;
 			break;
@@ -198,8 +202,13 @@ static int do_bootrom(int argc, char *argv[])
 		}
 	}
 
+	if (!rom_log.addr) {
+		const struct imx_scratch_space *scratch = arm_mem_scratch_get();
+		rom_log.ptr = scratch->bootrom_log;
+	}
+
 	if (log)
-		return imx8m_bootrom_decode_log(rom_log_addr);
+		return imx8m_bootrom_decode_log(rom_log.ptr);
 
 	return COMMAND_ERROR_USAGE;
 }
-- 
2.30.2