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Don't use core_alloc_maximum() in usb_storage.

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usb_storage needs a fairly reasonable amount of memory. Allocating
what we need and no more allows other (future) USB drivers to get
something too, and is much cleaner in general.

Change-Id: Iec9573c0f251f02400f92d92727cbf2969785de0
This commit is contained in:
Frank Gevaerts 2014-01-04 23:35:00 +01:00
parent 26b317e094
commit 656261bde1
1 changed files with 5 additions and 6 deletions
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11
firmware/usbstack/usb_storage.c
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@ -74,7 +74,8 @@
#endif /* CONFIG_CPU == AS3525 */
#endif /* USB_READ_BUFFER_SIZE */
#define MAX_CBW_SIZE 1024
/* We don't use sizeof() here, because we *need* a multiple of 32 */
#define MAX_CBW_SIZE 32
#ifdef USB_WRITE_BUFFER_SIZE
#define WRITE_BUFFER_SIZE USB_WRITE_BUFFER_SIZE
@ -453,18 +454,16 @@ void usb_storage_init_connection(void)
ramdisk_buffer = _ramdisk_buffer;
#endif
#else
/* TODO : check if bufsize is at least 32K ? */
size_t bufsize;
unsigned char * buffer;
/* dummy ops with no callbacks, needed because by
* default buflib buffers can be moved around which must be avoided */
static struct buflib_callbacks dummy_ops;
usb_handle = core_alloc_maximum("usb storage", &bufsize, &dummy_ops);
// Add 31 to handle worst-case misalignment
usb_handle = core_alloc_ex("usb storage", ALLOCATE_BUFFER_SIZE + MAX_CBW_SIZE + 31, &dummy_ops);
if (usb_handle < 0)
panicf("%s(): OOM", __func__);
if (bufsize < ALLOCATE_BUFFER_SIZE + MAX_CBW_SIZE + 31)
panicf("%s(): got only %d, not enough", __func__, bufsize);
buffer = core_get_data(usb_handle);
#if defined(UNCACHED_ADDR) && CONFIG_CPU != AS3525
cbw_buffer = (void *)UNCACHED_ADDR((unsigned int)(buffer+31) & 0xffffffe0);