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hw/misc/sifive_u_otp: handling the fails of blk_pread and blk_pwrite 

Fix code coverage issues by checking return value and handling fail case
of blk_pread() and blk_pwrite(). Return default value 0xff if read fails.

Fixes: Coverity CID 1435959
Fixes: Coverity CID 1435960
Fixes: Coverity CID 1435961
Signed-off-by: Green Wan <green.wan@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20201104092900.21214-1-green.wan@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Green Wan 2020-11-04 17:29:00 +08:00 committed by Alistair Francis
parent 1eaada8ae1
commit 29b5fe0dcd
1 changed files with 23 additions and 8 deletions
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31
hw/misc/sifive_u_otp.c
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@ -63,8 +63,13 @@ static uint64_t sifive_u_otp_read(void *opaque, hwaddr addr, unsigned int size)
if (s->blk) {
int32_t buf;
blk_pread(s->blk, s->pa * SIFIVE_U_OTP_FUSE_WORD, &buf,
SIFIVE_U_OTP_FUSE_WORD);
if (blk_pread(s->blk, s->pa * SIFIVE_U_OTP_FUSE_WORD, &buf,
SIFIVE_U_OTP_FUSE_WORD) < 0) {
qemu_log_mask(LOG_GUEST_ERROR,
"read error index<%d>\n", s->pa);
return 0xff;
}
return buf;
}
@ -161,8 +166,12 @@ static void sifive_u_otp_write(void *opaque, hwaddr addr,
/* write to backend */
if (s->blk) {
blk_pwrite(s->blk, s->pa * SIFIVE_U_OTP_FUSE_WORD,
&s->fuse[s->pa], SIFIVE_U_OTP_FUSE_WORD, 0);
if (blk_pwrite(s->blk, s->pa * SIFIVE_U_OTP_FUSE_WORD,
&s->fuse[s->pa], SIFIVE_U_OTP_FUSE_WORD,
0) < 0) {
qemu_log_mask(LOG_GUEST_ERROR,
"write error index<%d>\n", s->pa);
}
}
/* update written bit */
@ -249,12 +258,18 @@ static void sifive_u_otp_reset(DeviceState *dev)
int index = SIFIVE_U_OTP_SERIAL_ADDR;
serial_data = s->serial;
blk_pwrite(s->blk, index * SIFIVE_U_OTP_FUSE_WORD,
&serial_data, SIFIVE_U_OTP_FUSE_WORD, 0);
if (blk_pwrite(s->blk, index * SIFIVE_U_OTP_FUSE_WORD,
&serial_data, SIFIVE_U_OTP_FUSE_WORD, 0) < 0) {
qemu_log_mask(LOG_GUEST_ERROR,
"write error index<%d>\n", index);
}
serial_data = ~(s->serial);
blk_pwrite(s->blk, (index + 1) * SIFIVE_U_OTP_FUSE_WORD,
&serial_data, SIFIVE_U_OTP_FUSE_WORD, 0);
if (blk_pwrite(s->blk, (index + 1) * SIFIVE_U_OTP_FUSE_WORD,
&serial_data, SIFIVE_U_OTP_FUSE_WORD, 0) < 0) {
qemu_log_mask(LOG_GUEST_ERROR,
"write error index<%d>\n", index + 1);
}
}
/* Initialize write-once map */