[PATCH] smsc-ircc2: drop DIM macro in favor of ARRAY_SIZE

IRDA: smsc-ircc2 - remove home-grown DIM macro, use ARRAY_SIZE intead.
      Also fix out-of-bound array access.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/net/irda/smsc-ircc2.c b/drivers/net/irda/smsc-ircc2.c
index ab3ff0cd0431fabd8ebd62d2909cf56dc6cc073c..a5090ddb0d0f5225d5a44a65da84ea234e45c6bc 100644 (file)
--- a/drivers/net/irda/smsc-ircc2.c
+++ b/drivers/net/irda/smsc-ircc2.c
@@ -163,7 +163,6 @@ struct smsc_ircc_cb {
 /* Constants */
 
 static const char *driver_name = "smsc-ircc2";
-#define        DIM(x)  (sizeof(x)/(sizeof(*(x))))
 #define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED       9600
 #define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER       1
 #define SMSC_IRCC2_C_NET_TIMEOUT               0
@@ -240,7 +239,7 @@ static smsc_transceiver_t smsc_transceivers[] =
        { "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
        { NULL, NULL }
 };
-#define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (DIM(smsc_transceivers)-1)
+#define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
 
 /*  SMC SuperIO chipsets definitions */
 
@@ -400,7 +399,7 @@ static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u
                goto err_out;
 
        err = -ENOMEM;
-       if (dev_count > DIM(dev_self)) {
+       if (dev_count >= ARRAY_SIZE(dev_self)) {
                IRDA_WARNING("%s(), too many devices!\n", __FUNCTION__);
                goto err_out1;
        }