[alsa-devel] [PATCH 0/3] ALSA: Minor sparse warning fixes
Hi,
this is a series of a few trivial fixes mostly for annotations that caused sparse warnings.
Takashi
===
Takashi Iwai (3): ALSA: via82xx: Fix endianness annotations ALSA: emu10k1: Fix endianness annotations ALSA: emu8000: Fix the cast to __user pointer
sound/isa/sb/emu8000_pcm.c | 4 ++-- sound/pci/emu10k1/emu10k1_main.c | 4 +++- sound/pci/via82xx.c | 6 ++++-- sound/pci/via82xx_modem.c | 6 ++++-- 4 files changed, 13 insertions(+), 7 deletions(-)
The internal page tables are in little endian, hence they should be __le32 type. This fixes the relevant sparse warnings: sound/pci/via82xx.c:454:60: warning: incorrect type in assignment (different base types) sound/pci/via82xx.c:454:60: expected unsigned int [usertype] sound/pci/via82xx.c:454:60: got restricted __le32 [usertype] ....
No functional changes, just sparse warning fixes.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/pci/via82xx.c | 6 ++++-- sound/pci/via82xx_modem.c | 6 ++++-- 2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c index 799789c8eea9..8b03e2dc503f 100644 --- a/sound/pci/via82xx.c +++ b/sound/pci/via82xx.c @@ -414,6 +414,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre { unsigned int i, idx, ofs, rest; struct via82xx *chip = snd_pcm_substream_chip(substream); + __le32 *pgtbl;
if (dev->table.area == NULL) { /* the start of each lists must be aligned to 8 bytes, @@ -435,6 +436,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre /* fill the entries */ idx = 0; ofs = 0; + pgtbl = (__le32 *)dev->table.area; for (i = 0; i < periods; i++) { rest = fragsize; /* fill descriptors for a period. @@ -451,7 +453,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre return -EINVAL; } addr = snd_pcm_sgbuf_get_addr(substream, ofs); - ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr); + pgtbl[idx << 1] = cpu_to_le32(addr); r = snd_pcm_sgbuf_get_chunk_size(substream, ofs, rest); rest -= r; if (! rest) { @@ -466,7 +468,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre "tbl %d: at %d size %d (rest %d)\n", idx, ofs, r, rest); */ - ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag); + pgtbl[(idx<<1) + 1] = cpu_to_le32(r | flag); dev->idx_table[idx].offset = ofs; dev->idx_table[idx].size = r; ofs += r; diff --git a/sound/pci/via82xx_modem.c b/sound/pci/via82xx_modem.c index 84e589803e2e..607b7100db1c 100644 --- a/sound/pci/via82xx_modem.c +++ b/sound/pci/via82xx_modem.c @@ -267,6 +267,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre { unsigned int i, idx, ofs, rest; struct via82xx_modem *chip = snd_pcm_substream_chip(substream); + __le32 *pgtbl;
if (dev->table.area == NULL) { /* the start of each lists must be aligned to 8 bytes, @@ -288,6 +289,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre /* fill the entries */ idx = 0; ofs = 0; + pgtbl = (__le32 *)dev->table.area; for (i = 0; i < periods; i++) { rest = fragsize; /* fill descriptors for a period. @@ -304,7 +306,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre return -EINVAL; } addr = snd_pcm_sgbuf_get_addr(substream, ofs); - ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr); + pgtbl[idx << 1] = cpu_to_le32(addr); r = PAGE_SIZE - (ofs % PAGE_SIZE); if (rest < r) r = rest; @@ -321,7 +323,7 @@ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substre "tbl %d: at %d size %d (rest %d)\n", idx, ofs, r, rest); */ - ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag); + pgtbl[(idx<<1) + 1] = cpu_to_le32(r | flag); dev->idx_table[idx].offset = ofs; dev->idx_table[idx].size = r; ofs += r;
The internal page tables are little endian, hence they should be __le32 type. This fixes the relevant sparse warning: sound/pci/emu10k1/emu10k1_main.c:2013:51: warning: incorrect type in assignment (different base types) sound/pci/emu10k1/emu10k1_main.c:2013:51: expected unsigned int [usertype] sound/pci/emu10k1/emu10k1_main.c:2013:51: got restricted __le32 [usertype]
No functional changes, just sparse warning fixes.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/pci/emu10k1/emu10k1_main.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c index a89a7e603ca8..6ff581733a19 100644 --- a/sound/pci/emu10k1/emu10k1_main.c +++ b/sound/pci/emu10k1/emu10k1_main.c @@ -1789,6 +1789,7 @@ int snd_emu10k1_create(struct snd_card *card, int idx, err; int is_audigy; size_t page_table_size; + __le32 *pgtbl; unsigned int silent_page; const struct snd_emu_chip_details *c; static const struct snd_device_ops ops = { @@ -2009,8 +2010,9 @@ int snd_emu10k1_create(struct snd_card *card, /* Clear silent pages and set up pointers */ memset(emu->silent_page.area, 0, emu->silent_page.bytes); silent_page = emu->silent_page.addr << emu->address_mode; + pgtbl = (__le32 *)emu->ptb_pages.area; for (idx = 0; idx < (emu->address_mode ? MAXPAGES1 : MAXPAGES0); idx++) - ((u32 *)emu->ptb_pages.area)[idx] = cpu_to_le32(silent_page | idx); + pgtbl[idx] = cpu_to_le32(silent_page | idx);
/* set up voice indices */ for (idx = 0; idx < NUM_G; idx++) {
Fixes the sparse warnings. The cast to __user pointer needs __force: sound/isa/sb/emu8000_pcm.c:528:9: warning: cast removes address space 'asn:1' of expression
No functional changes, just sparse warning fixes.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/isa/sb/emu8000_pcm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/isa/sb/emu8000_pcm.c b/sound/isa/sb/emu8000_pcm.c index e377ac93f37f..8e8257c574b0 100644 --- a/sound/isa/sb/emu8000_pcm.c +++ b/sound/isa/sb/emu8000_pcm.c @@ -435,7 +435,7 @@ enum { #define LOOP_WRITE(rec, offset, _buf, count, mode) \ do { \ struct snd_emu8000 *emu = (rec)->emu; \ - unsigned short *buf = (unsigned short *)(_buf); \ + unsigned short *buf = (__force unsigned short *)(_buf); \ snd_emu8000_write_wait(emu, 1); \ EMU8000_SMALW_WRITE(emu, offset); \ while (count > 0) { \ @@ -492,7 +492,7 @@ static int emu8k_pcm_silence(struct snd_pcm_substream *subs, #define LOOP_WRITE(rec, pos, _buf, count, mode) \ do { \ struct snd_emu8000 *emu = rec->emu; \ - unsigned short *buf = (unsigned short *)(_buf); \ + unsigned short *buf = (__force unsigned short *)(_buf); \ snd_emu8000_write_wait(emu, 1); \ EMU8000_SMALW_WRITE(emu, pos + rec->loop_start[0]); \ if (rec->voices > 1) \
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Takashi Iwai