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Don't reissue in-flight commands.
Approved by: neel (co-mentor)
This commit is contained in:
parent
b3ea9d99ed
commit
4feac03f2c
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=263322
@ -134,6 +134,7 @@ struct ahci_port {
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uint8_t xfermode;
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uint8_t sense_key;
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uint8_t asc;
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uint32_t pending;
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uint32_t clb;
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uint32_t clbu;
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@ -471,6 +472,10 @@ ahci_handle_dma(struct ahci_port *p, int slot, uint8_t *cfis, uint32_t done,
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if (iovcnt > BLOCKIF_IOV_MAX) {
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aior->prdtl = iovcnt - BLOCKIF_IOV_MAX;
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iovcnt = BLOCKIF_IOV_MAX;
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/*
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* Mark this command in-flight.
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*/
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p->pending |= 1 << slot;
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} else
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aior->prdtl = 0;
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breq->br_iovcnt = iovcnt;
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@ -494,7 +499,7 @@ ahci_handle_dma(struct ahci_port *p, int slot, uint8_t *cfis, uint32_t done,
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err = blockif_write(p->bctx, breq);
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assert(err == 0);
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if (!aior->prdtl && ncq)
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if (ncq)
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p->ci &= ~(1 << slot);
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}
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@ -1327,8 +1332,12 @@ ahci_handle_port(struct ahci_port *p)
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if (!(p->cmd & AHCI_P_CMD_ST))
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return;
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/*
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* Search for any new commands to issue ignoring those that
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* are already in-flight.
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*/
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for (i = 0; (i < 32) && p->ci; i++) {
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if (p->ci & (1 << i))
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if ((p->ci & (1 << i)) && !(p->pending & (1 << i)))
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ahci_handle_slot(p, i);
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}
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}
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@ -1389,6 +1398,11 @@ ata_ioreq_cb(struct blockif_req *br, int err)
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p->serr |= (1 << slot);
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}
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/*
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* This command is now complete.
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*/
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p->pending &= ~(1 << slot);
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if (ncq) {
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p->sact &= ~(1 << slot);
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ahci_write_fis_sdb(p, slot, tfd);
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