From: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Date: Thu, 27 May 2010 20:13:27 +0000 (-0500)
Subject: [SCSI] hpsa: hpsa factor out hpsa_find_board_params
X-Git-Tag: firefly_0821_release~9833^2~1305^2~264
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b93d7536eaa1206ad4a00ad8ea700ff0bd75a0da;p=firefly-linux-kernel-4.4.55.git

[SCSI] hpsa: hpsa factor out hpsa_find_board_params

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 4983f3452dc4..dcbe54b1dfba 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3348,6 +3348,30 @@ static int __devinit hpsa_find_cfgtables(struct ctlr_info *h)
 	return 0;
 }
 
+/* Interrogate the hardware for some limits:
+ * max commands, max SG elements without chaining, and with chaining,
+ * SG chain block size, etc.
+ */
+static void __devinit hpsa_find_board_params(struct ctlr_info *h)
+{
+	h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
+	h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */
+	h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
+	/*
+	 * Limit in-command s/g elements to 32 save dma'able memory.
+	 * Howvever spec says if 0, use 31
+	 */
+	h->max_cmd_sg_entries = 31;
+	if (h->maxsgentries > 512) {
+		h->max_cmd_sg_entries = 32;
+		h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
+		h->maxsgentries--; /* save one for chain pointer */
+	} else {
+		h->maxsgentries = 31; /* default to traditional values */
+		h->chainsize = 0;
+	}
+}
+
 static int __devinit hpsa_pci_init(struct ctlr_info *h)
 {
 	int i, prod_index, err;
@@ -3389,27 +3413,7 @@ static int __devinit hpsa_pci_init(struct ctlr_info *h)
 	err = hpsa_find_cfgtables(h);
 	if (err)
 		goto err_out_free_res;
-
-	h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
-	h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
-
-	/*
-	 * Limit in-command s/g elements to 32 save dma'able memory.
-	 * Howvever spec says if 0, use 31
-	 */
-
-	h->max_cmd_sg_entries = 31;
-	if (h->maxsgentries > 512) {
-		h->max_cmd_sg_entries = 32;
-		h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
-		h->maxsgentries--; /* save one for chain pointer */
-	} else {
-		h->maxsgentries = 31; /* default to traditional values */
-		h->chainsize = 0;
-	}
-
-	/* Allow room for some ioctls */
-	h->nr_cmds = h->max_commands - 4;
+	hpsa_find_board_params(h);
 
 	if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
 	    (readb(&h->cfgtable->Signature[1]) != 'I') ||