atari_NCR5380: Move static co-routine variables to host data
Unlike NCR5380.c, the atari_NCR5380.c core driver is limited to a single
instance because co-routine state is stored globally.
Fix this by removing the static scsi host pointer. For the co-routine,
obtain this pointer from the work_struct pointer instead. For the interrupt
handler, obtain it from the dev_id argument.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/scsi/atari_NCR5380.c b/drivers/scsi/atari_NCR5380.c
index 590035f..f1f9f47 100644
--- a/drivers/scsi/atari_NCR5380.c
+++ b/drivers/scsi/atari_NCR5380.c
@@ -221,9 +221,6 @@
* possible) function may be used.
*/
-static struct Scsi_Host *first_instance = NULL;
-static struct scsi_host_template *the_template = NULL;
-
/* Macros ease life... :-) */
#define SETUP_HOSTDATA(in) \
struct NCR5380_hostdata *hostdata = \
@@ -595,32 +592,19 @@
#include <linux/workqueue.h>
#include <linux/interrupt.h>
-static volatile int main_running;
-static DECLARE_WORK(NCR5380_tqueue, NCR5380_main);
-
-static inline void queue_main(void)
+static inline void queue_main(struct NCR5380_hostdata *hostdata)
{
- if (!main_running) {
+ if (!hostdata->main_running) {
/* If in interrupt and NCR5380_main() not already running,
queue it on the 'immediate' task queue, to be processed
immediately after the current interrupt processing has
finished. */
- schedule_work(&NCR5380_tqueue);
+ schedule_work(&hostdata->main_task);
}
/* else: nothing to do: the running NCR5380_main() will pick up
any newly queued command. */
}
-
-static inline void NCR5380_all_init(void)
-{
- static int done = 0;
- if (!done) {
- dprintk(NDEBUG_INIT, "scsi : NCR5380_all_init()\n");
- done = 1;
- }
-}
-
/**
* NCR58380_info - report driver and host information
* @instance: relevant scsi host instance
@@ -703,7 +687,7 @@
local_irq_save(flags);
printk("NCR5380: coroutine is%s running.\n",
- main_running ? "" : "n't");
+ hostdata->main_running ? "" : "n't");
if (!hostdata->connected)
printk("scsi%d: no currently connected command\n", HOSTNO);
else
@@ -746,7 +730,7 @@
local_irq_save(flags);
seq_printf(m, "NCR5380: coroutine is%s running.\n",
- main_running ? "" : "n't");
+ hostdata->main_running ? "" : "n't");
if (!hostdata->connected)
seq_printf(m, "scsi%d: no currently connected command\n", HOSTNO);
else
@@ -783,8 +767,7 @@
int i;
SETUP_HOSTDATA(instance);
- NCR5380_all_init();
-
+ hostdata->host = instance;
hostdata->aborted = 0;
hostdata->id_mask = 1 << instance->this_id;
hostdata->id_higher_mask = 0;
@@ -805,10 +788,7 @@
hostdata->disconnected_queue = NULL;
hostdata->flags = flags;
- if (!the_template) {
- the_template = instance->hostt;
- first_instance = instance;
- }
+ INIT_WORK(&hostdata->main_task, NCR5380_main);
prepare_info(instance);
@@ -829,7 +809,9 @@
static void NCR5380_exit(struct Scsi_Host *instance)
{
- cancel_work_sync(&NCR5380_tqueue);
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+
+ cancel_work_sync(&hostdata->main_task);
}
/**
@@ -924,9 +906,9 @@
* unconditionally, because it cannot be already running.
*/
if (in_interrupt() || irqs_disabled())
- queue_main();
+ queue_main(hostdata);
else
- NCR5380_main(NULL);
+ NCR5380_main(&hostdata->main_task);
return 0;
}
@@ -955,9 +937,10 @@
static void NCR5380_main(struct work_struct *work)
{
+ struct NCR5380_hostdata *hostdata =
+ container_of(work, struct NCR5380_hostdata, main_task);
+ struct Scsi_Host *instance = hostdata->host;
struct scsi_cmnd *tmp, *prev;
- struct Scsi_Host *instance = first_instance;
- struct NCR5380_hostdata *hostdata = HOSTDATA(instance);
int done;
unsigned long flags;
@@ -982,9 +965,9 @@
'main_running' is set here, and queues/executes main via the
task queue, it doesn't do any harm, just this instance of main
won't find any work left to do. */
- if (main_running)
+ if (hostdata->main_running)
return;
- main_running = 1;
+ hostdata->main_running = 1;
local_save_flags(flags);
do {
@@ -1103,7 +1086,7 @@
/* Better allow ints _after_ 'main_running' has been cleared, else
an interrupt could believe we'll pick up the work it left for
us, but we won't see it anymore here... */
- main_running = 0;
+ hostdata->main_running = 0;
local_irq_restore(flags);
}
@@ -1215,7 +1198,7 @@
static irqreturn_t NCR5380_intr(int irq, void *dev_id)
{
- struct Scsi_Host *instance = first_instance;
+ struct Scsi_Host *instance = dev_id;
int done = 1, handled = 0;
unsigned char basr;
@@ -1287,7 +1270,7 @@
if (!done) {
dprintk(NDEBUG_INTR, "scsi%d: in int routine, calling main\n", HOSTNO);
/* Put a call to NCR5380_main() on the queue... */
- queue_main();
+ queue_main(shost_priv(instance));
}
return IRQ_RETVAL(handled);
}
@@ -1767,7 +1750,7 @@
* Returns : 0 on success, -1 on failure.
*/
-static int do_abort(struct Scsi_Host *host)
+static int do_abort(struct Scsi_Host *instance)
{
unsigned char tmp, *msgptr, phase;
int len;
@@ -1802,7 +1785,7 @@
msgptr = &tmp;
len = 1;
phase = PHASE_MSGOUT;
- NCR5380_transfer_pio(host, &phase, &len, &msgptr);
+ NCR5380_transfer_pio(instance, &phase, &len, &msgptr);
/*
* If we got here, and the command completed successfully,