[SCSI] hpsa: check that simple mode is supported
before trying to enter simple mode transport method. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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@ -3413,6 +3413,11 @@ static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
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static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
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{
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int i;
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u32 trans_support;
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trans_support = readl(&(h->cfgtable->TransportSupport));
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if (!(trans_support & SIMPLE_MODE))
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return -ENOTSUPP;
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h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
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/* Update the field, and then ring the doorbell */
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