From ec530174c43798099d305fbd6511e5d7fc7616d4 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Mon, 4 Jun 2018 19:18:03 +0200 Subject: s390/dasd: only use preallocated requests Change the remaining users of dasd_kmalloc_request to use preallocated memory and remove this function. Signed-off-by: Sebastian Ott Reviewed-by: Stefan Haberland Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd.c | 66 ----------------------------------------- drivers/s390/block/dasd_alias.c | 6 ++-- drivers/s390/block/dasd_eer.c | 10 +++---- drivers/s390/block/dasd_int.h | 3 -- 4 files changed, 8 insertions(+), 77 deletions(-) diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 01a1d1dabb43..d3a38c421503 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -1222,51 +1222,6 @@ static void dasd_hosts_init(struct dentry *base_dentry, device->hosts_dentry = pde; } -/* - * Allocate memory for a channel program with 'cplength' channel - * command words and 'datasize' additional space. There are two - * variantes: 1) dasd_kmalloc_request uses kmalloc to get the needed - * memory and 2) dasd_smalloc_request uses the static ccw memory - * that gets allocated for each device. - */ -struct dasd_ccw_req *dasd_kmalloc_request(int magic, int cplength, - int datasize, - struct dasd_device *device) -{ - struct dasd_ccw_req *cqr; - - /* Sanity checks */ - BUG_ON(datasize > PAGE_SIZE || - (cplength*sizeof(struct ccw1)) > PAGE_SIZE); - - cqr = kzalloc(sizeof(struct dasd_ccw_req), GFP_ATOMIC); - if (cqr == NULL) - return ERR_PTR(-ENOMEM); - cqr->cpaddr = NULL; - if (cplength > 0) { - cqr->cpaddr = kcalloc(cplength, sizeof(struct ccw1), - GFP_ATOMIC | GFP_DMA); - if (cqr->cpaddr == NULL) { - kfree(cqr); - return ERR_PTR(-ENOMEM); - } - } - cqr->data = NULL; - if (datasize > 0) { - cqr->data = kzalloc(datasize, GFP_ATOMIC | GFP_DMA); - if (cqr->data == NULL) { - kfree(cqr->cpaddr); - kfree(cqr); - return ERR_PTR(-ENOMEM); - } - } - cqr->magic = magic; - set_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); - dasd_get_device(device); - return cqr; -} -EXPORT_SYMBOL(dasd_kmalloc_request); - struct dasd_ccw_req *dasd_smalloc_request(int magic, int cplength, int datasize, struct dasd_device *device, struct dasd_ccw_req *cqr) @@ -1309,27 +1264,6 @@ struct dasd_ccw_req *dasd_smalloc_request(int magic, int cplength, int datasize, } EXPORT_SYMBOL(dasd_smalloc_request); -/* - * Free memory of a channel program. This function needs to free all the - * idal lists that might have been created by dasd_set_cda and the - * struct dasd_ccw_req itself. - */ -void dasd_kfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) -{ - struct ccw1 *ccw; - - /* Clear any idals used for the request. */ - ccw = cqr->cpaddr; - do { - clear_normalized_cda(ccw); - } while (ccw++->flags & (CCW_FLAG_CC | CCW_FLAG_DC)); - kfree(cqr->cpaddr); - kfree(cqr->data); - kfree(cqr); - dasd_put_device(device); -} -EXPORT_SYMBOL(dasd_kfree_request); - void dasd_sfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device) { unsigned long flags; diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c index 5e963fe0e38d..e36a114354fc 100644 --- a/drivers/s390/block/dasd_alias.c +++ b/drivers/s390/block/dasd_alias.c @@ -407,9 +407,9 @@ static int read_unit_address_configuration(struct dasd_device *device, int rc; unsigned long flags; - cqr = dasd_kmalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, (sizeof(struct dasd_psf_prssd_data)), - device); + device, NULL); if (IS_ERR(cqr)) return PTR_ERR(cqr); cqr->startdev = device; @@ -457,7 +457,7 @@ static int read_unit_address_configuration(struct dasd_device *device, lcu->flags |= NEED_UAC_UPDATE; spin_unlock_irqrestore(&lcu->lock, flags); } - dasd_kfree_request(cqr, cqr->memdev); + dasd_sfree_request(cqr, cqr->memdev); return rc; } diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c index fb2c3599d95c..6545342bd43f 100644 --- a/drivers/s390/block/dasd_eer.c +++ b/drivers/s390/block/dasd_eer.c @@ -447,7 +447,7 @@ static void dasd_eer_snss_cb(struct dasd_ccw_req *cqr, void *data) * is a new ccw in device->eer_cqr. Free the "old" * snss request now. */ - dasd_kfree_request(cqr, device); + dasd_sfree_request(cqr, device); } /* @@ -472,8 +472,8 @@ int dasd_eer_enable(struct dasd_device *device) if (rc) goto out; - cqr = dasd_kmalloc_request(DASD_ECKD_MAGIC, 1 /* SNSS */, - SNSS_DATA_SIZE, device); + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* SNSS */, + SNSS_DATA_SIZE, device, NULL); if (IS_ERR(cqr)) { rc = -ENOMEM; cqr = NULL; @@ -505,7 +505,7 @@ out: spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); if (cqr) - dasd_kfree_request(cqr, device); + dasd_sfree_request(cqr, device); return rc; } @@ -528,7 +528,7 @@ void dasd_eer_disable(struct dasd_device *device) in_use = test_and_clear_bit(DASD_FLAG_EER_IN_USE, &device->flags); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); if (cqr && !in_use) - dasd_kfree_request(cqr, device); + dasd_sfree_request(cqr, device); } /* diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 55bcbbed1b1d..976b6bd4fb05 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -706,11 +706,8 @@ extern const struct block_device_operations dasd_device_operations; extern struct kmem_cache *dasd_page_cache; -struct dasd_ccw_req * -dasd_kmalloc_request(int , int, int, struct dasd_device *); struct dasd_ccw_req * dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); -void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); void dasd_wakeup_cb(struct dasd_ccw_req *, void *); -- cgit v1.2.1