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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 01:16:43 +07:00
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
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#define MMC_QUEUE_H
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#define MMC_REQ_SPECIAL_MASK (REQ_DISCARD | REQ_FLUSH)
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struct request;
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struct task_struct;
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struct mmc_blk_request {
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struct mmc_request mrq;
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struct mmc_command sbc;
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struct mmc_command cmd;
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struct mmc_command stop;
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struct mmc_data data;
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};
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enum mmc_packed_type {
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MMC_PACKED_NONE = 0,
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MMC_PACKED_WRITE,
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};
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#define mmc_packed_cmd(type) ((type) != MMC_PACKED_NONE)
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#define mmc_packed_wr(type) ((type) == MMC_PACKED_WRITE)
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struct mmc_packed {
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struct list_head list;
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u32 cmd_hdr[1024];
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unsigned int blocks;
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u8 nr_entries;
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u8 retries;
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s16 idx_failure;
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};
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struct mmc_queue_req {
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struct request *req;
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struct mmc_blk_request brq;
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struct scatterlist *sg;
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char *bounce_buf;
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struct scatterlist *bounce_sg;
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unsigned int bounce_sg_len;
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struct mmc_async_req mmc_active;
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enum mmc_packed_type cmd_type;
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struct mmc_packed *packed;
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};
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struct mmc_queue {
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struct mmc_card *card;
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struct task_struct *thread;
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struct semaphore thread_sem;
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unsigned int flags;
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#define MMC_QUEUE_SUSPENDED (1 << 0)
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#define MMC_QUEUE_NEW_REQUEST (1 << 1)
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int (*issue_fn)(struct mmc_queue *, struct request *);
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void *data;
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struct request_queue *queue;
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struct mmc_queue_req mqrq[2];
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struct mmc_queue_req *mqrq_cur;
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struct mmc_queue_req *mqrq_prev;
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};
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extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
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const char *);
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extern void mmc_cleanup_queue(struct mmc_queue *);
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extern void mmc_queue_suspend(struct mmc_queue *);
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extern void mmc_queue_resume(struct mmc_queue *);
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extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
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struct mmc_queue_req *);
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extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
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extern void mmc_queue_bounce_post(struct mmc_queue_req *);
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extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
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extern void mmc_packed_clean(struct mmc_queue *);
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#endif
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