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authorSergei Shtylyov <sergei.shtylyov@cogentembedded.com>2019-10-31 23:37:27 +0300
committerVignesh Raghavendra <vigneshr@ti.com>2019-11-09 12:13:41 +0300
commit72914a8cff7e1d910c58e125e15a0da409e3135f (patch)
tree43651d00d60efb21c55c46012a8c7a14cefd8a4f /drivers/mtd
parent03976af89e3bd9489d542582a325892e6a8cacc0 (diff)
downloadlinux-72914a8cff7e1d910c58e125e15a0da409e3135f.tar.xz
mtd: cfi_cmdset_0002: only check errors when ready in cfi_check_err_status()
Cypress S26K{L|S}P{128|256|512}S datasheet says that the error bits in the status register are only valid when the "device ready" bit 7 is set. Add the check for the device ready bit in cfi_check_err_status() as that function isn't always called with this bit set. Fixes: 4844ef80305d ("mtd: cfi_cmdset_0002: Add support for polling status register") Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 5b2a25b49333..d5c2e5430241 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -136,6 +136,10 @@ static void cfi_check_err_status(struct map_info *map, struct flchip *chip,
cfi->device_type, NULL);
status = map_read(map, adr);
+ /* The error bits are invalid while the chip's busy */
+ if (!map_word_bitsset(map, status, CMD(CFI_SR_DRB)))
+ return;
+
if (map_word_bitsset(map, status, CMD(0x3a))) {
unsigned long chipstatus = MERGESTATUS(status);