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serial: mfd: snprintf() returns largish values 

snprintf() returns the number of bytes which would have been written so
it can be larger than the size of the buffer.  In this case it's fine,
but people copy and paste this code so I've fixed it.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dan Carpenter 2010-08-12 09:50:09 +02:00 committed by Greg Kroah-Hartman
parent de838a93cb
commit a958981140
1 changed files with 6 additions and 0 deletions
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6
drivers/serial/mfd.c
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@ -172,6 +172,9 @@ static ssize_t port_show_regs(struct file *file, char __user *user_buf,
len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
"DIV: \t\t0x%08x\n", serial_in(up, UART_DIV));
if (len > HSU_REGS_BUFSIZE)
len = HSU_REGS_BUFSIZE;
ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return ret;
@ -219,6 +222,9 @@ static ssize_t dma_show_regs(struct file *file, char __user *user_buf,
len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
"D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3TSR));
if (len > HSU_REGS_BUFSIZE)
len = HSU_REGS_BUFSIZE;
ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return ret;