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cpu: microblaze: add error handling in microblaze_cpu_get_desc()

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Check snprintf() return value for errors.

Make microblaze_cpu_get_desc() directly return snprintf() error code if
ret < 0. Otherwise, if the return value is greater than or equal to size,
the resulting string is truncated, so return -ENOSPC.

Fixes: 816226d27e ("cpu: add CPU driver for microblaze")
Signed-off-by: Ovidiu Panait <ovpanait@gmail.com>
Link: https://lore.kernel.org/r/20220829170205.1274484-2-ovpanait@gmail.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
Ovidiu Panait 2022-08-29 20:02:03 +03:00 committed by Michal Simek
parent 3a6948ce71
commit 3f351cd358
1 changed files with 3 additions and 1 deletions
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4
drivers/cpu/microblaze_cpu.c
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@ -97,8 +97,10 @@ static int microblaze_cpu_get_desc(const struct udevice *dev, char *buf,
ret = snprintf(buf, size, ret = snprintf(buf, size,
"MicroBlaze @ %uMHz, Rev: %s, FPGA family: %s", "MicroBlaze @ %uMHz, Rev: %s, FPGA family: %s",
cpu_freq_mhz, cpu_ver, fpga_family); cpu_freq_mhz, cpu_ver, fpga_family);
if (ret < 0)
return ret;
return 0; return (ret >= size) ? -ENOSPC : 0;
} }
static int microblaze_cpu_get_info(const struct udevice *dev, static int microblaze_cpu_get_info(const struct udevice *dev,