From: Arthur Benilov Date: Tue, 16 Feb 2010 14:41:21 +0000 (+0100) Subject: Staging: vme: Allocate memory buffers for master windows X-Git-Tag: firefly_0821_release~9833^2~2832^2~1^2~52 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=33e920d9ebaddbc9cf51cf6e1de7baa8d7b8d6dd;p=firefly-linux-kernel-4.4.55.git Staging: vme: Allocate memory buffers for master windows For VME device I/O operations on master windows the user driver tends to use kern_buf buffer array which is not allocated. This causes an error when reading from master window device files. Signed-off-by: Arthur Benilov Signed-off-by: Vincent Bossier Acked-by: Martyn Welch Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c index 0d404f1a27f4..c60c80fb241d 100644 --- a/drivers/staging/vme/devices/vme_user.c +++ b/drivers/staging/vme/devices/vme_user.c @@ -738,6 +738,14 @@ static int __init vme_user_probe(struct device *dev, int cur_bus, int cur_slot) "resource\n"); goto err_master; } + image[i].size_buf = PCI_BUF_SIZE; + image[i].kern_buf = kmalloc(image[i].size_buf, GFP_KERNEL); + if (image[i].kern_buf == NULL) { + printk(KERN_WARNING "Unable to allocate memory for " + "master window buffers\n"); + err = -ENOMEM; + goto err_master_buf; + } } /* Create sysfs entries - on udev systems this creates the dev files */ @@ -791,6 +799,9 @@ err_sysfs: /* Ensure counter set correcty to unalloc all master windows */ i = MASTER_MAX + 1; +err_master_buf: + for (i = MASTER_MINOR; i < (MASTER_MAX + 1); i++) + kfree(image[i].kern_buf); err_master: while (i > MASTER_MINOR) { i--; @@ -826,6 +837,9 @@ static int __exit vme_user_remove(struct device *dev, int cur_bus, int cur_slot) } class_destroy(vme_user_sysfs_class); + for (i = MASTER_MINOR; i < (MASTER_MAX + 1); i++) + kfree(image[i].kern_buf); + for (i = SLAVE_MINOR; i < (SLAVE_MAX + 1); i++) { vme_slave_set(image[i].resource, 0, 0, 0, 0, VME_A32, 0); vme_slave_free(image[i].resource);