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[PATCH] libata: use preallocated buffers

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It's not a very good idea to allocate memory during EH.  Use
statically allocated buffer for dev->id[] and add 512byte buffer
ap->sector_buf.  This buffer is owned by EH (or probing) and to be
used as temporary buffer for various purposes (IDENTIFY, NCQ log page
10h, PM GSCR block).

Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Tejun Heo
2006-05-15 20:57:35 +09:00
parent 158693031d
commit fe635c7e91
2 changed files with 11 additions and 25 deletions
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4
include/linux/libata.h
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@@ -360,7 +360,7 @@ struct ata_device {
unsigned long flags; /* ATA_DFLAG_xxx */
unsigned int class; /* ATA_DEV_xxx */
unsigned int devno; /* 0 or 1 */
u16 *id; /* IDENTIFY xxx DEVICE data */
u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
u8 pio_mode;
u8 dma_mode;
u8 xfer_mode;
@@ -425,6 +425,8 @@ struct ata_port {
struct list_head eh_done_q;
void *private_data;
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
};
struct ata_port_operations {