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Date: Tue, 22 May 2007 08:44:58 -0400
From: Jeff Garzik <jeff@...zik.org>
To: Andrew Morton <akpm@...ux-foundation.org>, kkeil@...e.de,
kai.germaschewski@....de
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] ISDN: move card state init to separate function
The follow is the first baby step towards moving the HiSax drivers to
the new PCI API. The HiSax PCI initialization code is ass-backwards and
an incredible pain, so this will take many steps. If anybody is
motivated to assist, help is more than welcome!
The first step just moves some code into a separate function, with the
general direction being the isolation of card-generic code away from all
the heavily #ifdef'd card-specific code.
This patch should not change any behavior at all. It only includes very
trivial code modifications, like s/kmalloc/kzalloc/, use of gfp_mask,
and the allocation of cs->rcvbuf was moved up to be with the rest of the
memory allocations.
Further changes will be checked into this git branch:
The 'isdn-pci' branch of
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6.git
contains the following updates:
drivers/isdn/hisax/config.c | 83 ++++++++++++++++++++++++++++--------------
1 files changed, 55 insertions(+), 28 deletions(-)
Jeff Garzik (1):
[ISDN] hisax: split cs alloc and init away from checkcard()
diff --git a/drivers/isdn/hisax/config.c b/drivers/isdn/hisax/config.c
index da4196f..6c9a336 100644
--- a/drivers/isdn/hisax/config.c
+++ b/drivers/isdn/hisax/config.c
@@ -847,13 +847,14 @@ static int init_card(struct IsdnCardState *cs)
return 3;
}
-static int checkcard(int cardnr, char *id, int *busy_flag, struct module *lockowner)
+static int hisax_new_cs(int cardnr, struct IsdnCard *card,
+ struct IsdnCardState **cs_out, int *busy_flag,
+ struct module *lockowner, gfp_t gfp_mask)
{
- int ret = 0;
- struct IsdnCard *card = cards + cardnr;
struct IsdnCardState *cs;
+ int rc = -ENOMEM;
- cs = kzalloc(sizeof(struct IsdnCardState), GFP_ATOMIC);
+ cs = kzalloc(sizeof(struct IsdnCardState), gfp_mask);
if (!cs) {
printk(KERN_WARNING
"HiSax: No memory for IsdnCardState(card %d)\n",
@@ -870,30 +871,32 @@ static int checkcard(int cardnr, char *id, int *busy_flag, struct module *lockow
cs->HW_Flags = 0;
cs->busy_flag = busy_flag;
cs->irq_flags = I4L_IRQ_FLAG;
-#if TEI_PER_CARD
- if (card->protocol == ISDN_PTYPE_NI1)
- test_and_set_bit(FLG_TWO_DCHAN, &cs->HW_Flags);
-#else
- test_and_set_bit(FLG_TWO_DCHAN, &cs->HW_Flags);
-#endif
+
cs->protocol = card->protocol;
if (card->typ <= 0 || card->typ > ISDN_CTYPE_COUNT) {
printk(KERN_WARNING
"HiSax: Card Type %d out of range\n", card->typ);
+ rc = -EINVAL;
goto outf_cs;
}
- if (!(cs->dlog = kmalloc(MAX_DLOG_SPACE, GFP_ATOMIC))) {
+
+ if (!(cs->dlog = kzalloc(MAX_DLOG_SPACE, gfp_mask))) {
printk(KERN_WARNING
"HiSax: No memory for dlog(card %d)\n", cardnr + 1);
goto outf_cs;
}
- if (!(cs->status_buf = kmalloc(HISAX_STATUS_BUFSIZE, GFP_ATOMIC))) {
+ if (!(cs->status_buf = kzalloc(HISAX_STATUS_BUFSIZE, gfp_mask))) {
printk(KERN_WARNING
"HiSax: No memory for status_buf(card %d)\n",
cardnr + 1);
goto outf_dlog;
}
+ if (!(cs->rcvbuf = kzalloc(MAX_DFRAME_LEN_L1, gfp_mask))) {
+ printk(KERN_WARNING "HiSax: No memory for isac rcvbuf\n");
+ goto outf_status;
+ }
+
cs->stlist = NULL;
cs->status_read = cs->status_buf;
cs->status_write = cs->status_buf;
@@ -911,22 +914,53 @@ static int checkcard(int cardnr, char *id, int *busy_flag, struct module *lockow
ISDN_FEATURE_L2_HDLC |
ISDN_FEATURE_L2_HDLC_56K |
ISDN_FEATURE_L2_TRANS |
- ISDN_FEATURE_L3_TRANS |
+ ISDN_FEATURE_L3_TRANS;
+ cs->iif.command = HiSax_command;
+ cs->iif.writecmd = NULL;
+ cs->iif.writebuf_skb = HiSax_writebuf_skb;
+ cs->iif.readstat = HiSax_readstatus;
+
+ *cs_out = cs;
+ return 0;
+
+outf_status:
+ kfree(cs->status_buf);
+outf_dlog:
+ kfree(cs->dlog);
+outf_cs:
+ kfree(cs);
+ card->cs = NULL;
+out:
+ *cs_out = NULL;
+ return rc;
+}
+
+static int checkcard(int cardnr, char *id, int *busy_flag, struct module *lockowner)
+{
+ int ret = 0, rc;
+ struct IsdnCard *card = cards + cardnr;
+ struct IsdnCardState *cs = NULL;
+
+ rc = hisax_new_cs(cardnr, card, &cs, busy_flag, lockowner, GFP_ATOMIC);
+ if (rc)
+ goto out; /* ret == 0 == error */
+
+#if TEI_PER_CARD
+ if (card->protocol == ISDN_PTYPE_NI1)
+ test_and_set_bit(FLG_TWO_DCHAN, &cs->HW_Flags);
+#else
+ test_and_set_bit(FLG_TWO_DCHAN, &cs->HW_Flags);
+#endif
#ifdef CONFIG_HISAX_1TR6
- ISDN_FEATURE_P_1TR6 |
+ cs->iif.features |= ISDN_FEATURE_P_1TR6;
#endif
#ifdef CONFIG_HISAX_EURO
- ISDN_FEATURE_P_EURO |
+ cs->iif.features |= ISDN_FEATURE_P_EURO;
#endif
#ifdef CONFIG_HISAX_NI1
- ISDN_FEATURE_P_NI1 |
+ cs->iif.features |= ISDN_FEATURE_P_NI1;
#endif
- 0;
- cs->iif.command = HiSax_command;
- cs->iif.writecmd = NULL;
- cs->iif.writebuf_skb = HiSax_writebuf_skb;
- cs->iif.readstat = HiSax_readstatus;
register_isdn(&cs->iif);
cs->myid = cs->iif.channels;
printk(KERN_INFO
@@ -1101,11 +1135,6 @@ static int checkcard(int cardnr, char *id, int *busy_flag, struct module *lockow
ll_unload(cs);
goto outf_cs;
}
- if (!(cs->rcvbuf = kmalloc(MAX_DFRAME_LEN_L1, GFP_ATOMIC))) {
- printk(KERN_WARNING "HiSax: No memory for isac rcvbuf\n");
- ll_unload(cs);
- goto outf_cs;
- }
cs->rcvidx = 0;
cs->tx_skb = NULL;
cs->tx_cnt = 0;
@@ -1146,8 +1175,6 @@ static int checkcard(int cardnr, char *id, int *busy_flag, struct module *lockow
ret = 1;
goto out;
- outf_dlog:
- kfree(cs->dlog);
outf_cs:
kfree(cs);
card->cs = NULL;
-
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