Hi.
(I hope you are the NCR53c406a maintainer. If not, I apologize for
the inconvenience and hope you can redirect me.)
The following patch makes drivers/scsi/NCR53c406a.c use the return
code of request_region instead of check_region and makes it release
the proper resources in its error paths.
It applies cleanly against ac10 and 241p9.
Comments?
--- linux-ac10-clean/drivers/scsi/NCR53c406a.c Mon Sep 18 22:36:24 2000
+++ linux-ac10/drivers/scsi/NCR53c406a.c Sun Jan 21 23:31:40 2001
@@ -184,13 +184,13 @@
/* ================================================================= */
#if USE_BIOS
-static void *bios_base = (void *)0;
+static void *bios_base;
#endif
#if PORT_BASE
static int port_base = PORT_BASE;
#else
-static int port_base = 0;
+static int port_base;
#endif
#if IRQ_LEV
@@ -200,16 +200,16 @@
#endif
#if USE_DMA
-static int dma_chan = 0;
+static int dma_chan;
#endif
#if USE_PIO
static int fast_pio = USE_FAST_PIO;
#endif
-static Scsi_Cmnd *current_SC = NULL;
-static volatile int internal_done_flag = 0;
-static volatile int internal_done_errcode = 0;
+static Scsi_Cmnd *current_SC;
+static volatile int internal_done_flag;
+static volatile int internal_done_errcode;
static char info_msg[256];
/* ================================================================= */
@@ -484,17 +484,17 @@
#endif USE_BIOS
#ifdef PORT_BASE
- if (check_region(port_base, 0x10)) /* ports already snatched */
+ if (!request_region(port_base, 0x10, "NCR53c406a")) /* ports already snatched */
port_base = 0;
#else /* autodetect */
if (port_base) { /* LILO override */
- if (check_region(port_base, 0x10))
+ if (!request_region(port_base, 0x10, "NCR53c406a"))
port_base = 0;
}
else {
for(i=0; i<PORT_COUNT && !port_base; i++){
- if(check_region(ports[i], 0x10)){
+ if(!request_region(ports[i], 0x10, "NCR53c406a")){
DEB(printk("NCR53c406a: port %x in use\n", ports[i]));
}
else {
@@ -503,9 +503,10 @@
if( (inb(ports[i] + 0x0e) ^ inb(ports[i] + 0x0e)) == 7
&& (inb(ports[i] + 0x0e) ^ inb(ports[i] + 0x0e)) == 7
&& (inb(ports[i] + 0x0e) & 0xf8) == 0x58 ) {
+ port_base = ports[i];
VDEB(printk("NCR53c406a: Sig register valid\n"));
VDEB(printk("port_base=%x\n", port_base));
- port_base = ports[i];
+ break;
}
}
}
@@ -527,18 +528,17 @@
irq_level=irq_probe();
if (irq_level < 0) { /* Trouble */
printk("NCR53c406a: IRQ problem, irq_level=%d, giving up\n", irq_level);
- return 0;
+ goto err_release;
}
}
#endif
DEB(printk("NCR53c406a: using port_base %x\n", port_base));
- request_region(port_base, 0x10, "NCR53c406a");
if(irq_level > 0) {
if(request_irq(irq_level, do_NCR53c406a_intr, 0, "NCR53c406a", NULL)){
printk("NCR53c406a: unable to allocate IRQ %d\n", irq_level);
- return 0;
+ goto err_release;
}
tpnt->can_queue = 1;
DEB(printk("NCR53c406a: allocated IRQ %d\n", irq_level));
@@ -548,19 +548,19 @@
DEB(printk("NCR53c406a: No interrupts detected\n"));
#if USE_DMA
printk("NCR53c406a: No interrupts found and DMA mode defined. Giving up.\n");
- return 0;
+ goto err_release;
#endif USE_DMA
}
else {
DEB(printk("NCR53c406a: Shouldn't get here!\n"));
- return 0;
+ goto err_release;
}
#if USE_DMA
dma_chan = DMA_CHAN;
if(request_dma(dma_chan, "NCR53c406a") != 0){
printk("NCR53c406a: unable to allocate DMA channel %d\n", dma_chan);
- return 0;
+ goto err_release;
}
DEB(printk("Allocated DMA channel %d\n", dma_chan));
@@ -570,6 +570,10 @@
tpnt->proc_name = "NCR53c406a";
shpnt = scsi_register(tpnt, 0);
+ if (!shpnt) {
+ printk("NCR53c406a: Unable to register host, giving up.\n");
+ goto err_free_dma;
+ }
shpnt->irq = irq_level;
shpnt->io_port = port_base;
shpnt->n_io_port = 0x10;
@@ -586,6 +590,17 @@
#endif
return (tpnt->present);
+
+
+ err_free_dma:
+#ifdef USE_DMA
+ free_dma(dma_chan);
+#endif
+ err_free_irq:
+ free_irq(irq_level, do_NCR53c406a_intr);
+ err_release:
+ release_region(port_base, 0x10);
+ return 0;
}
/* called from init/main.c */
--
Rasmus(rasmus@jaquet.dk)
That lowdown scoundrel deserves to be kicked to death by a jackass, and
I'm just the one to do it. -A congressional candidate in Texas
-
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This archive was generated by hypermail 2b29 : Tue Jan 23 2001 - 21:00:26 EST