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Commit 4434a38c authored by Cornelia Huck's avatar Cornelia Huck Committed by Martin Schwidefsky
Browse files

[S390] cio: Reorganize initialization. 



- Localize more of the init calls in init_channel_subsystem().
- Print a warning if init_channel_subsystem() failed.

Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 303fa9e3

drivers/s390/cio/chsc.c

+6 −4
Original line number Diff line number Diff line
@@ -990,8 +990,7 @@ out: 
	return ret;

}



static int __init

chsc_alloc_sei_area(void)

int __init chsc_alloc_sei_area(void)

{

	sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);

	if (!sei_page)
@@ -1000,6 +999,11 @@ chsc_alloc_sei_area(void) 
	return (sei_page ? 0 : -ENOMEM);

}



void __init chsc_free_sei_area(void)

{

	kfree(sei_page);

}



int __init

chsc_enable_facility(int operation_code)

{
@@ -1051,8 +1055,6 @@ chsc_enable_facility(int operation_code) 
	return ret;

}



subsys_initcall(chsc_alloc_sei_area);



struct css_general_char css_general_characteristics;

struct css_chsc_char css_chsc_characteristics;

drivers/s390/cio/chsc.h

+2 −0
Original line number Diff line number Diff line
@@ -79,6 +79,8 @@ extern int chsc_get_ssd_info(struct subchannel_id schid, 
			     struct chsc_ssd_info *ssd);

extern int chsc_determine_css_characteristics(void);

extern int css_characteristics_avail;

extern int chsc_alloc_sei_area(void);

extern void chsc_free_sei_area(void);



extern int chsc_enable_facility(int);

struct channel_subsystem;

drivers/s390/cio/css.c

+16 −3
Original line number Diff line number Diff line
@@ -377,8 +377,6 @@ static int __init slow_subchannel_init(void) 
	return 0;

}



subsys_initcall(slow_subchannel_init);



static void css_slow_path_func(struct work_struct *unused)

{

	struct subchannel_id schid;
@@ -641,9 +639,20 @@ init_channel_subsystem (void) 
{

	int ret, i;



	if (chsc_determine_css_characteristics() == 0)

	ret = chsc_determine_css_characteristics();

	if (ret == -ENOMEM)

		goto out; /* No need to continue. */

	if (ret == 0)

		css_characteristics_avail = 1;



	ret = chsc_alloc_sei_area();

	if (ret)

		goto out;



	ret = slow_subchannel_init();

	if (ret)

		goto out;



	if ((ret = bus_register(&css_bus_type)))

		goto out;
@@ -709,6 +718,10 @@ out_unregister: 
out_bus:

	bus_unregister(&css_bus_type);

out:

	chsc_free_sei_area();

	kfree(slow_subchannel_set);

	printk(KERN_WARNING"cio: failed to initialize css driver (%d)!\n",

	       ret);

	return ret;

}