[PATCH] remove redundant NULL checks before kfree() in sound/ and avoid casting pointers about to be kfree()'ed
Checking a pointer for NULL before calling kfree() on it is redundant,
kfree() deals with NULL pointers just fine.
This patch removes such checks from sound/
This patch also makes another, but closely related, change.
It avoids casting pointers about to be kfree()'ed.
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/sound/oss/ad1848.c b/sound/oss/ad1848.c
index 4384dac..7c835ab 100644
--- a/sound/oss/ad1848.c
+++ b/sound/oss/ad1848.c
@@ -2178,8 +2178,7 @@
if (devc != NULL)
{
- if(audio_devs[dev]->portc!=NULL)
- kfree(audio_devs[dev]->portc);
+ kfree(audio_devs[dev]->portc);
release_region(devc->base, 4);
if (!share_dma)
diff --git a/sound/oss/ad1889.c b/sound/oss/ad1889.c
index b767c62..2cfd214 100644
--- a/sound/oss/ad1889.c
+++ b/sound/oss/ad1889.c
@@ -277,8 +277,7 @@
for (j = 0; j < AD_MAX_STATES; j++) {
dmabuf = &dev->state[j].dmabuf;
- if (dmabuf->rawbuf != NULL)
- kfree(dmabuf->rawbuf);
+ kfree(dmabuf->rawbuf);
}
kfree(dev);
diff --git a/sound/oss/dmasound/dmasound_awacs.c b/sound/oss/dmasound/dmasound_awacs.c
index 5281b88..3310866 100644
--- a/sound/oss/dmasound/dmasound_awacs.c
+++ b/sound/oss/dmasound/dmasound_awacs.c
@@ -671,14 +671,10 @@
release_OF_resource(awacs_node, 1);
release_OF_resource(awacs_node, 2);
- if (awacs_tx_cmd_space)
- kfree(awacs_tx_cmd_space);
- if (awacs_rx_cmd_space)
- kfree(awacs_rx_cmd_space);
- if (beep_dbdma_cmd_space)
- kfree(beep_dbdma_cmd_space);
- if (beep_buf)
- kfree(beep_buf);
+ kfree(awacs_tx_cmd_space);
+ kfree(awacs_rx_cmd_space);
+ kfree(beep_dbdma_cmd_space);
+ kfree(beep_buf);
#ifdef CONFIG_PMAC_PBOOK
pmu_unregister_sleep_notifier(&awacs_sleep_notifier);
#endif
@@ -2301,8 +2297,7 @@
#endif
if ((write_sq.max_count + 1) > number_of_tx_cmd_buffers) {
- if (awacs_tx_cmd_space)
- kfree(awacs_tx_cmd_space);
+ kfree(awacs_tx_cmd_space);
number_of_tx_cmd_buffers = 0;
/* we need nbufs + 1 (for the loop) and we should request + 1
@@ -2360,8 +2355,7 @@
#endif
if ((read_sq.max_count+1) > number_of_rx_cmd_buffers ) {
- if (awacs_rx_cmd_space)
- kfree(awacs_rx_cmd_space);
+ kfree(awacs_rx_cmd_space);
number_of_rx_cmd_buffers = 0;
/* we need nbufs + 1 (for the loop) and we should request + 1 again
@@ -2805,7 +2799,7 @@
beep_buf = (short *) kmalloc(BEEP_BUFLEN * 4, GFP_KERNEL);
if (beep_buf == NULL) {
printk(KERN_ERR "dmasound_pmac: no memory for beep buffer\n");
- if( beep_dbdma_cmd_space ) kfree(beep_dbdma_cmd_space) ;
+ kfree(beep_dbdma_cmd_space) ;
return -ENOMEM ;
}
return 0 ;
diff --git a/sound/oss/emu10k1/midi.c b/sound/oss/emu10k1/midi.c
index 33dea3d..b40b5f9 100644
--- a/sound/oss/emu10k1/midi.c
+++ b/sound/oss/emu10k1/midi.c
@@ -523,10 +523,8 @@
card = midi_devs[dev]->devc;
emu10k1_mpuout_close(card);
- if (card->seq_mididev) {
- kfree(card->seq_mididev);
- card->seq_mididev = NULL;
- }
+ kfree(card->seq_mididev);
+ card->seq_mididev = NULL;
}
int emu10k1_seq_midi_out(int dev, unsigned char midi_byte)
diff --git a/sound/oss/emu10k1/passthrough.c b/sound/oss/emu10k1/passthrough.c
index 4094be5..4e3baca 100644
--- a/sound/oss/emu10k1/passthrough.c
+++ b/sound/oss/emu10k1/passthrough.c
@@ -213,8 +213,7 @@
sblive_writeptr(card, SPCS0 + i, 0, pt->old_spcs[i]);
}
pt->state = PT_STATE_INACTIVE;
- if(pt->buf)
- kfree(pt->buf);
+ kfree(pt->buf);
}
}
diff --git a/sound/oss/maestro.c b/sound/oss/maestro.c
index 52d2db4..3dce504 100644
--- a/sound/oss/maestro.c
+++ b/sound/oss/maestro.c
@@ -2356,7 +2356,7 @@
}
rec_return_free:
- if(combbuf) kfree(combbuf);
+ kfree(combbuf);
return ret;
}
diff --git a/sound/oss/mpu401.c b/sound/oss/mpu401.c
index b66f53f..0aac54c 100644
--- a/sound/oss/mpu401.c
+++ b/sound/oss/mpu401.c
@@ -1240,8 +1240,7 @@
p=mpu401_synth_operations[n];
sound_unload_mididev(n);
sound_unload_timerdev(hw_config->slots[2]);
- if(p)
- kfree(p);
+ kfree(p);
}
}
diff --git a/sound/oss/sb_common.c b/sound/oss/sb_common.c
index ce359e6..5f955e3 100644
--- a/sound/oss/sb_common.c
+++ b/sound/oss/sb_common.c
@@ -915,8 +915,8 @@
}
else
release_region(hw_config->io_base, 16);
- if(detected_devc)
- kfree(detected_devc);
+
+ kfree(detected_devc);
}
/*