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media: atomisp: fix mask and shift operation on ISPSSPM0 

Currently the check on bits 25:24 on ISPSSPM0 is always 0 because
the mask and shift operations are incorrect. Fix this by shifting
by MRFLD_ISPSSPM0_ISPSSS_OFFSET (24 bits right) and then masking
with RFLD_ISPSSPM0_ISPSSC_MASK (0x03) to get the appropriate 2 bits
to check.

Addresses-Coverity: ("Operands don't affect result")
Fixes: 0f441fd70b ("media: atomisp: simplify the power down/up code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Colin Ian King 2020-07-16 15:51:38 +01:00 committed by Mauro Carvalho Chehab
parent 85ebb8eb12
commit 23988c9704
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/media/atomisp/pci/atomisp_v4l2.c
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@ -743,7 +743,7 @@ static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable)
/* Wait until ISPSSPM0 bit[25:24] shows the right value */
iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, MRFLD_ISPSSPM0, &tmp);
tmp = (tmp & MRFLD_ISPSSPM0_ISPSSC_MASK) >> MRFLD_ISPSSPM0_ISPSSS_OFFSET;
tmp = (tmp >> MRFLD_ISPSSPM0_ISPSSS_OFFSET) & MRFLD_ISPSSPM0_ISPSSC_MASK;
if (tmp == val) {
trace_ipu_cstate(enable);
return 0;