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Date: Tue, 16 Jan 2007 21:07:38 +0200
From: "Ahmed S. Darwish" <darwish.07@...il.com>
To: Randy Dunlap <randy.dunlap@...cle.com>
Cc: "Robert P. J. Day" <rpjday@...dspring.com>, isely@...ox.com,
video4linux-list@...hat.com, linux-kernel@...r.kernel.org,
trivial@...nel.org
Subject: Re: [PATCH 2.6.20-rc5 2/4] pvrusb2: Use ARRAY_SIZE macro
On Tue, Jan 16, 2007 at 10:16:33AM -0800, Randy Dunlap wrote:
> On Tue, 16 Jan 2007 03:36:16 -0500 (EST) Robert P. J. Day wrote:
>
> > On Tue, 16 Jan 2007, Ahmed S. Darwish wrote:
> >
> > > Use ARRAY_SIZE macro in pvrusb2-hdw.c file
> > >
> > > Signed-off-by: Ahmed S. Darwish <darwish.07@...il.com>
> >
> > ... snip ...
> >
> > i'm not sure it's worth submitting multiple patches to convert code
> > expressions to the ARRAY_SIZE() macro since i was going to wait for
> > the next kernel release, and do that in one fell swoop with a single
> > patch.
> >
> > but if people higher up the food chain think it's a better idea to do
> > it a little at a time, that's fine.
>
> I'm not strictly on the food chain, but these 4 patches to
> pvrusb2 should have been sent as one patch IMO.
Here's the same patch in one file as suggested.
A patch to use ARRAY_SIZE macro when appropriate.
Signed-off-by: Ahmed S. Darwish <darwish.07@...il.com>
---
pvrusb2-encoder.c | 19 ++++++++-----------
pvrusb2-hdw.c | 22 ++++++++--------------
pvrusb2-i2c-core.c | 3 +--
pvrusb2-std.c | 25 +++++++++----------------
pvrusb2-sysfs.c | 2 +-
pvrusb2-video-v4l.c | 9 +++------
pvrusb2-wm8775.c | 9 +++------
7 files changed, 33 insertions(+), 56 deletions(-)
diff --git a/drivers/media/video/pvrusb2/pvrusb2-encoder.c b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
index c94f97b..4ec937a 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-encoder.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
@@ -169,25 +169,23 @@ static int pvr2_encoder_cmd(void *ctxt,
*/
- if (arg_cnt_send > (sizeof(wrData)/sizeof(wrData[0]))-4) {
+ if (arg_cnt_send > (ARRAY_SIZE(wrData) - 4)) {
pvr2_trace(
PVR2_TRACE_ERROR_LEGS,
"Failed to write cx23416 command"
" - too many input arguments"
" (was given %u limit %u)",
- arg_cnt_send,
- (unsigned int)(sizeof(wrData)/sizeof(wrData[0])) - 4);
+ arg_cnt_send, ARRAY_SIZE(wrData) - 4);
return -EINVAL;
}
- if (arg_cnt_recv > (sizeof(rdData)/sizeof(rdData[0]))-4) {
+ if (arg_cnt_recv > (ARRAY_SIZE(rdData) - 4)) {
pvr2_trace(
PVR2_TRACE_ERROR_LEGS,
"Failed to write cx23416 command"
" - too many return arguments"
" (was given %u limit %u)",
- arg_cnt_recv,
- (unsigned int)(sizeof(rdData)/sizeof(rdData[0])) - 4);
+ arg_cnt_recv, ARRAY_SIZE(rdData) - 4);
return -EINVAL;
}
@@ -201,7 +199,7 @@ static int pvr2_encoder_cmd(void *ctxt,
for (idx = 0; idx < arg_cnt_send; idx++) {
wrData[idx+4] = argp[idx];
}
- for (; idx < (sizeof(wrData)/sizeof(wrData[0]))-4; idx++) {
+ for (; idx < ARRAY_SIZE(wrData) - 4; idx++) {
wrData[idx+4] = 0;
}
@@ -245,8 +243,7 @@ static int pvr2_encoder_cmd(void *ctxt,
if (ret) break;
wrData[0] = 0x7;
ret = pvr2_encoder_read_words(
- hdw,0,rdData,
- sizeof(rdData)/sizeof(rdData[0]));
+ hdw,0,rdData, ARRAY_SIZE(rdData));
if (ret) break;
for (idx = 0; idx < arg_cnt_recv; idx++) {
argp[idx] = rdData[idx+4];
@@ -269,13 +266,13 @@ static int pvr2_encoder_vcmd(struct pvr2_hdw *hdw, int cmd,
unsigned int idx;
u32 data[12];
- if (args > sizeof(data)/sizeof(data[0])) {
+ if (args > ARRAY_SIZE(data)) {
pvr2_trace(
PVR2_TRACE_ERROR_LEGS,
"Failed to write cx23416 command"
" - too many arguments"
" (was given %u limit %u)",
- args,(unsigned int)(sizeof(data)/sizeof(data[0])));
+ args, ARRAY_SIZE(data));
return -EINVAL;
}
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index d200496..f66f7c6 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -71,12 +71,10 @@ static const char *pvr2_client_29xxx[] = {
static struct pvr2_string_table pvr2_client_lists[] = {
[PVR2_HDW_TYPE_29XXX] = {
- pvr2_client_29xxx,
- sizeof(pvr2_client_29xxx)/sizeof(pvr2_client_29xxx[0]),
+ pvr2_client_29xxx, ARRAY_SIZE(pvr2_client_29xxx)
},
[PVR2_HDW_TYPE_24XXX] = {
- pvr2_client_24xxx,
- sizeof(pvr2_client_24xxx)/sizeof(pvr2_client_24xxx[0]),
+ pvr2_client_24xxx, ARRAY_SIZE(pvr2_client_24xxx)
},
};
@@ -212,7 +210,7 @@ static const struct pvr2_mpeg_ids mpeg_ids[] = {
.id = V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM,
}
};
-#define MPEGDEF_COUNT (sizeof(mpeg_ids)/sizeof(mpeg_ids[0]))
+#define MPEGDEF_COUNT ARRAY_SIZE(mpeg_ids)
static const char *control_values_srate[] = {
@@ -846,7 +844,7 @@ static const struct pvr2_ctl_info control_defs[] = {
}
};
-#define CTRLDEF_COUNT (sizeof(control_defs)/sizeof(control_defs[0]))
+#define CTRLDEF_COUNT ARRAY_SIZE(control_defs)
const char *pvr2_config_get_name(enum pvr2_config cfg)
@@ -960,12 +958,10 @@ static int pvr2_upload_firmware1(struct pvr2_hdw *hdw)
};
static const struct pvr2_string_table fw_file_defs[] = {
[PVR2_HDW_TYPE_29XXX] = {
- fw_files_29xxx,
- sizeof(fw_files_29xxx)/sizeof(fw_files_29xxx[0]),
+ fw_files_29xxx, ARRAY_SIZE(fw_files_29xxx)
},
[PVR2_HDW_TYPE_24XXX] = {
- fw_files_24xxx,
- sizeof(fw_files_24xxx)/sizeof(fw_files_24xxx[0]),
+ fw_files_24xxx, ARRAY_SIZE(fw_files_24xxx)
},
};
hdw->fw1_state = FW1_STATE_FAILED; // default result
@@ -1052,8 +1048,7 @@ int pvr2_upload_firmware2(struct pvr2_hdw *hdw)
trace_firmware("pvr2_upload_firmware2");
ret = pvr2_locate_firmware(hdw,&fw_entry,"encoder",
- sizeof(fw_files)/sizeof(fw_files[0]),
- fw_files);
+ ARRAY_SIZE(fw_files), fw_files);
if (ret < 0) return ret;
fwidx = ret;
ret = 0;
@@ -1750,8 +1745,7 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
struct pvr2_ctl_info *ciptr;
hdw_type = devid - pvr2_device_table;
- if (hdw_type >=
- sizeof(pvr2_device_names)/sizeof(pvr2_device_names[0])) {
+ if (hdw_type >= ARRAY_SIZE(pvr2_device_names)) {
pvr2_trace(PVR2_TRACE_ERROR_LEGS,
"Bogus device type of %u reported",hdw_type);
return NULL;
diff --git a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c
index f9bb41d..83df9ee 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c
@@ -948,8 +948,7 @@ static void do_i2c_scan(struct pvr2_hdw *hdw)
printk("%s: i2c scan beginning\n",hdw->name);
for (i = 0; i < 128; i++) {
msg[0].addr = i;
- rc = i2c_transfer(&hdw->i2c_adap,msg,
- sizeof(msg)/sizeof(msg[0]));
+ rc = i2c_transfer(&hdw->i2c_adap,msg, ARRAY_SIZE(msg));
if (rc != 1) continue;
printk("%s: i2c scan: found device @ 0x%x\n",hdw->name,i);
}
diff --git a/drivers/media/video/pvrusb2/pvrusb2-std.c b/drivers/media/video/pvrusb2/pvrusb2-std.c
index f95c598..677f126 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-std.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-std.c
@@ -141,10 +141,8 @@ int pvr2_std_str_to_id(v4l2_std_id *idPtr,const char *bufPtr,
cnt = 0;
while ((cnt < bufSize) && (bufPtr[cnt] != '-')) cnt++;
if (cnt >= bufSize) return 0; // No more characters
- sp = find_std_name(
- std_groups,
- sizeof(std_groups)/sizeof(std_groups[0]),
- bufPtr,cnt);
+ sp = find_std_name(std_groups, ARRAY_SIZE(std_groups),
+ bufPtr,cnt);
if (!sp) return 0; // Illegal color system name
cnt++;
bufPtr += cnt;
@@ -163,8 +161,7 @@ int pvr2_std_str_to_id(v4l2_std_id *idPtr,const char *bufPtr,
if (ch == '/') break;
cnt++;
}
- sp = find_std_name(std_items,
- sizeof(std_items)/sizeof(std_items[0]),
+ sp = find_std_name(std_items, ARRAY_SIZE(std_items),
bufPtr,cnt);
if (!sp) return 0; // Illegal modulation system ID
t = sp->id & cmsk;
@@ -189,14 +186,10 @@ unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize,
unsigned int c1,c2;
cfl = 0;
c1 = 0;
- for (idx1 = 0;
- idx1 < sizeof(std_groups)/sizeof(std_groups[0]);
- idx1++) {
+ for (idx1 = 0; idx1 < ARRAY_SIZE(std_groups); idx1++) {
gp = std_groups + idx1;
gfl = 0;
- for (idx2 = 0;
- idx2 < sizeof(std_items)/sizeof(std_items[0]);
- idx2++) {
+ for (idx2 = 0; idx2 < ARRAY_SIZE(std_items); idx2++) {
ip = std_items + idx2;
if (!(gp->id & ip->id & id)) continue;
if (!gfl) {
@@ -279,7 +272,7 @@ static struct v4l2_standard generic_standards[] = {
}
};
-#define generic_standards_cnt (sizeof(generic_standards)/sizeof(generic_standards[0]))
+#define generic_standards_cnt ARRAY_SIZE(generic_standards)
static struct v4l2_standard *match_std(v4l2_std_id id)
{
@@ -348,7 +341,7 @@ struct v4l2_standard *pvr2_std_create_enum(unsigned int *countptr,
fmsk |= idmsk;
}
- for (idx2 = 0; idx2 < sizeof(std_mixes)/sizeof(std_mixes[0]); idx2++) {
+ for (idx2 = 0; idx2 < ARRAY_SIZE(std_mixes); idx2++) {
if ((id & std_mixes[idx2]) == std_mixes[idx2]) std_cnt++;
}
@@ -374,8 +367,8 @@ struct v4l2_standard *pvr2_std_create_enum(unsigned int *countptr,
idx = 0;
/* Enumerate potential special cases */
- for (idx2 = 0; ((idx2 < sizeof(std_mixes)/sizeof(std_mixes[0])) &&
- (idx < std_cnt)); idx2++) {
+ for (idx2 = 0; (idx2 < ARRAY_SIZE(std_mixes)) && (idx < std_cnt);
+ idx2++) {
if (!(id & std_mixes[idx2])) continue;
if (pvr2_std_fill(stddefs+idx,std_mixes[idx2])) idx++;
}
diff --git a/drivers/media/video/pvrusb2/pvrusb2-sysfs.c b/drivers/media/video/pvrusb2/pvrusb2-sysfs.c
index c294f46..17b5a3e 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-sysfs.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-sysfs.c
@@ -491,7 +491,7 @@ static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id)
unsigned int cnt,acnt;
int ret;
- if ((ctl_id < 0) || (ctl_id >= (sizeof(funcs)/sizeof(funcs[0])))) {
+ if ((ctl_id < 0) || (ctl_id >= ARRAY_SIZE(funcs))) {
return;
}
diff --git a/drivers/media/video/pvrusb2/pvrusb2-video-v4l.c b/drivers/media/video/pvrusb2/pvrusb2-video-v4l.c
index 05f2cdd..b3eba8a 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-video-v4l.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-video-v4l.c
@@ -137,8 +137,7 @@ static int decoder_check(struct pvr2_v4l_decoder *ctxt)
unsigned long msk;
unsigned int idx;
- for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]);
- idx++) {
+ for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
msk = 1 << idx;
if (ctxt->stale_mask & msk) continue;
if (decoder_ops[idx].check(ctxt)) {
@@ -154,8 +153,7 @@ static void decoder_update(struct pvr2_v4l_decoder *ctxt)
unsigned long msk;
unsigned int idx;
- for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]);
- idx++) {
+ for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
msk = 1 << idx;
if (!(ctxt->stale_mask & msk)) continue;
ctxt->stale_mask &= ~msk;
@@ -230,8 +228,7 @@ int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw,
ctxt->ctrl.tuned = (int (*)(void *))decoder_is_tuned;
ctxt->client = cp;
ctxt->hdw = hdw;
- ctxt->stale_mask = (1 << (sizeof(decoder_ops)/
- sizeof(decoder_ops[0]))) - 1;
+ ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
hdw->decoder_ctrl = &ctxt->ctrl;
cp->handler = &ctxt->handler;
pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up",
diff --git a/drivers/media/video/pvrusb2/pvrusb2-wm8775.c b/drivers/media/video/pvrusb2/pvrusb2-wm8775.c
index 2413e51..3a29bb8 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-wm8775.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-wm8775.c
@@ -99,8 +99,7 @@ static int wm8775_check(struct pvr2_v4l_wm8775 *ctxt)
unsigned long msk;
unsigned int idx;
- for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]);
- idx++) {
+ for (idx = 0; idx < ARRAY_SIZE(wm8775_ops); idx++) {
msk = 1 << idx;
if (ctxt->stale_mask & msk) continue;
if (wm8775_ops[idx].check(ctxt)) {
@@ -116,8 +115,7 @@ static void wm8775_update(struct pvr2_v4l_wm8775 *ctxt)
unsigned long msk;
unsigned int idx;
- for (idx = 0; idx < sizeof(wm8775_ops)/sizeof(wm8775_ops[0]);
- idx++) {
+ for (idx = 0; idx < ARRAY_SIZE(wm8775_ops); idx++) {
msk = 1 << idx;
if (!(ctxt->stale_mask & msk)) continue;
ctxt->stale_mask &= ~msk;
@@ -148,8 +146,7 @@ int pvr2_i2c_wm8775_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
ctxt->handler.func_table = &hfuncs;
ctxt->client = cp;
ctxt->hdw = hdw;
- ctxt->stale_mask = (1 << (sizeof(wm8775_ops)/
- sizeof(wm8775_ops[0]))) - 1;
+ ctxt->stale_mask = (1 << ARRAY_SIZE(wm8775_ops)) - 1;
cp->handler = &ctxt->handler;
pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x wm8775 V4L2 handler set up",
cp->client->addr);
--
Ahmed S. Darwish
http://darwish-07.blogspot.com
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