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authorNicolas Boullis <nboullis@debian.org>2012-10-16 00:06:23 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-17 13:45:49 -0700
commit301a29da6e891e7eb95c843af0ecdbe86d01f723 (patch)
tree06a394d2ee61a08f7ba07741eea2ff43fa67a82e /drivers/usb/class
parent6e1babb3ff2651376f2e9843569fcb39cfe4686b (diff)
downloadlinux-301a29da6e891e7eb95c843af0ecdbe86d01f723.tar.bz2
usb: acm: fix the computation of the number of data bits
The current code assumes that CSIZE is 0000060, which appears to be wrong on some arches (such as powerpc). Signed-off-by: Nicolas Boullis <nboullis@debian.org> Acked-by: Oliver Neukum <oneukum@suse.de> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class')
-rw-r--r--drivers/usb/class/cdc-acm.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 572f4e7bd3ff..6e49ec6f3adc 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -817,10 +817,6 @@ static const __u32 acm_tty_speed[] = {
2500000, 3000000, 3500000, 4000000
};
-static const __u8 acm_tty_size[] = {
- 5, 6, 7, 8
-};
-
static void acm_tty_set_termios(struct tty_struct *tty,
struct ktermios *termios_old)
{
@@ -834,7 +830,21 @@ static void acm_tty_set_termios(struct tty_struct *tty,
newline.bParityType = termios->c_cflag & PARENB ?
(termios->c_cflag & PARODD ? 1 : 2) +
(termios->c_cflag & CMSPAR ? 2 : 0) : 0;
- newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4];
+ switch (termios->c_cflag & CSIZE) {
+ case CS5:
+ newline.bDataBits = 5;
+ break;
+ case CS6:
+ newline.bDataBits = 6;
+ break;
+ case CS7:
+ newline.bDataBits = 7;
+ break;
+ case CS8:
+ default:
+ newline.bDataBits = 8;
+ break;
+ }
/* FIXME: Needs to clear unsupported bits in the termios */
acm->clocal = ((termios->c_cflag & CLOCAL) != 0);