Eric Lee / linux-smarc-t335x-v3.2

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Commit 563b04671017ea00ba563ebeebdc36bce79b1b60

Authored by J. R. Okajima
Committed by David S. Miller
1 parent dd7496f217
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

proc_dointvec: write a single value 

The commit 00b7c3395aec3df43de5bd02a3c5a099ca51169f
"sysctl: refactor integer handling proc code"
modified the behaviour of writing to /proc.
Before the commit, write("1\n") to /proc/sys/kernel/printk succeeded. But
now it returns EINVAL.

This commit supports writing a single value to a multi-valued entry.

Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
Reviewed-and-tested-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Showing 1 changed file with 3 additions and 1 deletions Side-by-side Diff

... ... @@ -2253,6 +2253,8 @@
2253 2253 if (write) {
2254 2254 left -= proc_skip_spaces(&kbuf);
2255 2255  
  2256 + if (!left)
  2257 + break;
2256 2258 err = proc_get_long(&kbuf, &left, &lval, &neg,
2257 2259 proc_wspace_sep,
2258 2260 sizeof(proc_wspace_sep), NULL);
... ... @@ -2279,7 +2281,7 @@
2279 2281  
2280 2282 if (!write && !first && left && !err)
2281 2283 err = proc_put_char(&buffer, &left, '\n');
2282   - if (write && !err)
  2284 + if (write && !err && left)
2283 2285 left -= proc_skip_spaces(&kbuf);
2284 2286 free:
2285 2287 if (write) {