diff options
| author | Mark Brown <broonie@kernel.org> | 2023-08-18 22:46:19 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-08-18 22:46:19 +0100 |
| commit | ab4724302feedcd33633fd409667a8ee0016f13d (patch) | |
| tree | 245c7082ca66780da02df0b7cedc91a5090b795f /drivers/scsi/scsi_proc.c | |
| parent | 46f53bde6e69edf8a2e0943babb3f160b30ee436 (diff) | |
| parent | ef75e767167a8f30c7690bc4689dba76329ee06e (diff) | |
Add cs42l43 PC focused SoundWire CODEC
Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:
This patch chain adds support for the Cirrus Logic cs42l43 PC focused
SoundWire CODEC.
Diffstat (limited to 'drivers/scsi/scsi_proc.c')
| -rw-r--r-- | drivers/scsi/scsi_proc.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/drivers/scsi/scsi_proc.c b/drivers/scsi/scsi_proc.c index 4a6eb1741be0..41f23cd0bfb4 100644 --- a/drivers/scsi/scsi_proc.c +++ b/drivers/scsi/scsi_proc.c @@ -406,7 +406,7 @@ static ssize_t proc_scsi_write(struct file *file, const char __user *buf, size_t length, loff_t *ppos) { int host, channel, id, lun; - char *buffer, *p; + char *buffer, *end, *p; int err; if (!buf || length > PAGE_SIZE) @@ -421,10 +421,14 @@ static ssize_t proc_scsi_write(struct file *file, const char __user *buf, goto out; err = -EINVAL; - if (length < PAGE_SIZE) - buffer[length] = '\0'; - else if (buffer[PAGE_SIZE-1]) - goto out; + if (length < PAGE_SIZE) { + end = buffer + length; + *end = '\0'; + } else { + end = buffer + PAGE_SIZE - 1; + if (*end) + goto out; + } /* * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi @@ -433,10 +437,10 @@ static ssize_t proc_scsi_write(struct file *file, const char __user *buf, if (!strncmp("scsi add-single-device", buffer, 22)) { p = buffer + 23; - host = simple_strtoul(p, &p, 0); - channel = simple_strtoul(p + 1, &p, 0); - id = simple_strtoul(p + 1, &p, 0); - lun = simple_strtoul(p + 1, &p, 0); + host = (p < end) ? simple_strtoul(p, &p, 0) : 0; + channel = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0; + id = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0; + lun = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0; err = scsi_add_single_device(host, channel, id, lun); @@ -447,10 +451,10 @@ static ssize_t proc_scsi_write(struct file *file, const char __user *buf, } else if (!strncmp("scsi remove-single-device", buffer, 25)) { p = buffer + 26; - host = simple_strtoul(p, &p, 0); - channel = simple_strtoul(p + 1, &p, 0); - id = simple_strtoul(p + 1, &p, 0); - lun = simple_strtoul(p + 1, &p, 0); + host = (p < end) ? simple_strtoul(p, &p, 0) : 0; + channel = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0; + id = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0; + lun = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0; err = scsi_remove_single_device(host, channel, id, lun); } |