mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
ef3a69c7a4
For normal request mmc_blk_issue_rq is called twice with asynchronous transfer(cur and prev). Host's claim and release can be done in each mmc_blk_issue_rq. However, Special request is currently excluded in asynchronous transfer. After special request is finished, if there is no new request, mmc_release_host won't be called in mmc_blk_issue_rq. The problem is founded during mmc_suspend. [<c0541124>] (__schedule+0x0/0x78c) from [<c05419e8>] (schedule+0x38/0x78) [<c05419b0>] (schedule+0x0/0x78) from [<c03a843c>] (__mmc_claim_host+0xac/0x1b4) [<c03a8390>] (__mmc_claim_host+0x0/0x1b4) from [<c03ac98c>] (mmc_suspend+0x28/0x9c) [<c03ac964>] (mmc_suspend+0x0/0x9c) from [<c03aad24>] (mmc_suspend_host+0xb4/0x194) ... Reported-by: Johan Rudholm <jrudholm@gmail.com> Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Tested-by: Johan Rudholm <johan.rudholm@stericsson.com> Signed-off-by: Chris Ball <cjb@laptop.org>
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
#ifndef MMC_QUEUE_H
|
|
#define MMC_QUEUE_H
|
|
|
|
#define MMC_REQ_SPECIAL_MASK (REQ_DISCARD | REQ_FLUSH)
|
|
|
|
struct request;
|
|
struct task_struct;
|
|
|
|
struct mmc_blk_request {
|
|
struct mmc_request mrq;
|
|
struct mmc_command sbc;
|
|
struct mmc_command cmd;
|
|
struct mmc_command stop;
|
|
struct mmc_data data;
|
|
};
|
|
|
|
enum mmc_packed_type {
|
|
MMC_PACKED_NONE = 0,
|
|
MMC_PACKED_WRITE,
|
|
};
|
|
|
|
#define mmc_packed_cmd(type) ((type) != MMC_PACKED_NONE)
|
|
#define mmc_packed_wr(type) ((type) == MMC_PACKED_WRITE)
|
|
|
|
struct mmc_packed {
|
|
struct list_head list;
|
|
u32 cmd_hdr[1024];
|
|
unsigned int blocks;
|
|
u8 nr_entries;
|
|
u8 retries;
|
|
s16 idx_failure;
|
|
};
|
|
|
|
struct mmc_queue_req {
|
|
struct request *req;
|
|
struct mmc_blk_request brq;
|
|
struct scatterlist *sg;
|
|
char *bounce_buf;
|
|
struct scatterlist *bounce_sg;
|
|
unsigned int bounce_sg_len;
|
|
struct mmc_async_req mmc_active;
|
|
enum mmc_packed_type cmd_type;
|
|
struct mmc_packed *packed;
|
|
};
|
|
|
|
struct mmc_queue {
|
|
struct mmc_card *card;
|
|
struct task_struct *thread;
|
|
struct semaphore thread_sem;
|
|
unsigned int flags;
|
|
#define MMC_QUEUE_SUSPENDED (1 << 0)
|
|
#define MMC_QUEUE_NEW_REQUEST (1 << 1)
|
|
|
|
int (*issue_fn)(struct mmc_queue *, struct request *);
|
|
void *data;
|
|
struct request_queue *queue;
|
|
struct mmc_queue_req mqrq[2];
|
|
struct mmc_queue_req *mqrq_cur;
|
|
struct mmc_queue_req *mqrq_prev;
|
|
};
|
|
|
|
extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
|
|
const char *);
|
|
extern void mmc_cleanup_queue(struct mmc_queue *);
|
|
extern void mmc_queue_suspend(struct mmc_queue *);
|
|
extern void mmc_queue_resume(struct mmc_queue *);
|
|
|
|
extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
|
|
struct mmc_queue_req *);
|
|
extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
|
|
extern void mmc_queue_bounce_post(struct mmc_queue_req *);
|
|
|
|
extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
|
|
extern void mmc_packed_clean(struct mmc_queue *);
|
|
|
|
#endif
|