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mtd: cfi_cmdset_0002: only check errors when ready in cfi_check_err_status()

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commit 72914a8cff7e1d910c58e125e15a0da409e3135f upstream.

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: 4844ef8030 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergei Shtylyov 2019-10-31 23:37:27 +03:00 • committed by Greg Kroah-Hartman
commit 1883f6047d
1 changed files with 4 additions and 0 deletions
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4
drivers/mtd/chips/cfi_cmdset_0002.c
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@ -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);