From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 06/15] mtd: cfi-flash: Fix compiler warning
Date: Mon, 17 May 2021 20:54:15 +0200 [thread overview]
Message-ID: <20210517185424.32145-7-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20210517185424.32145-1-s.hauer@pengutronix.de>
sector >= 0 is always true for the unsigned type flash_sect_t. This
means the loop to find the sector will only behave correctly when we
actually find the sector, but not in the error case. The error case
is not expected though and will not happen when the code is correct,
so just catch it with a BUG().
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/mtd/nor/cfi_flash.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nor/cfi_flash.c b/drivers/mtd/nor/cfi_flash.c
index ba0bd1b4eb..ffd29d80a7 100644
--- a/drivers/mtd/nor/cfi_flash.c
+++ b/drivers/mtd/nor/cfi_flash.c
@@ -466,9 +466,16 @@ flash_sect_t find_sector(struct flash_info *info, unsigned long addr)
{
flash_sect_t sector;
- for (sector = info->sector_count - 1; sector >= 0; sector--) {
+ sector = info->sector_count - 1;
+
+ while (1) {
if (addr >= info->start[sector])
break;
+
+ if (sector == 0)
+ BUG();
+
+ sector--;
}
return sector;
--
2.29.2
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next prev parent reply other threads:[~2021-05-17 18:56 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 18:54 [PATCH 00/15] Compiler warning fixes Sascha Hauer
2021-05-17 18:54 ` [PATCH 01/15] arm: friendlyarm-tiny210: Remove dead code Sascha Hauer
2021-05-17 18:54 ` [PATCH 02/15] ARM: socfpga: Fix timeout tests Sascha Hauer
2021-05-17 18:54 ` [PATCH 03/15] i.MX FCB: Fix error checking Sascha Hauer
2021-05-17 18:54 ` [PATCH 04/15] clk: tegra: Fix -Wtype-limits compiler warning Sascha Hauer
2021-05-17 18:54 ` [PATCH 05/15] ARM: i.MX: xload-gpmi: Fix " Sascha Hauer
2021-05-17 18:54 ` Sascha Hauer [this message]
2021-05-17 18:54 ` [PATCH 07/15] pci: mvebu: Fix wrong error check Sascha Hauer
2021-05-17 18:54 ` [PATCH 08/15] ARM: i.MX bbu-external-nand: Do not modify image Sascha Hauer
2021-05-17 18:54 ` [PATCH 09/15] ARM: layerscape: Fix wrong error check Sascha Hauer
2021-05-17 18:54 ` [PATCH 10/15] ARM: phytec-phycard-omap3: Fix checking of unsigned variable being negative Sascha Hauer
2021-05-17 18:54 ` [PATCH 11/15] scripts: zynq_mkimage: Make locally used function static Sascha Hauer
2021-05-17 18:54 ` [PATCH 12/15] ARM: module: Remove always false check Sascha Hauer
2021-05-17 18:54 ` [PATCH 13/15] aiodev: lm75: Handle unknown lm75 types Sascha Hauer
2021-05-17 18:54 ` [PATCH 14/15] clk: zynqmp: Fix wrong error check Sascha Hauer
2021-05-17 18:54 ` [PATCH 15/15] powerpc: law: use signed type to allow error checking Sascha Hauer
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