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libata: add ata_sg_is_last() helper, use it in several drivers

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This commit is contained in:
Jeff Garzik
2005-10-18 22:14:54 -04:00
parent b194b4250c
commit 972c26bdd6
4 changed files with 35 additions and 16 deletions
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12
include/linux/libata.h
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@@ -480,6 +480,18 @@ extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits);
#endif /* CONFIG_PCI */
static inline int
ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
{
if (sg == &qc->pad_sgent)
return 1;
if (qc->pad_len)
return 0;
if (((sg - qc->__sg) + 1) == qc->n_elem)
return 1;
return 0;
}
static inline struct scatterlist *
ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
{