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authorAaro Koskinen <aaro.koskinen@iki.fi>2013-10-10 20:25:31 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-11 22:45:59 (GMT)
commita2dfef06e68321d4b2cc4a6671b318193f2a049f (patch)
treeabead3ed0e54753178b37dbebb4626658d7cb0f4 /drivers/staging/octeon-usb
parentf121910396a7a1c123efcf9c6a6971c6c75ec377 (diff)
staging: octeon-usb: use dynamic allocation for transactions
Use dynamic memory allocation for transactions. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/octeon-usb')
-rw-r--r--drivers/staging/octeon-usb/octeon-hcd.c75
1 files changed, 2 insertions, 73 deletions
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c b/drivers/staging/octeon-usb/octeon-hcd.c
index da96461..65b3d4c 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -257,9 +257,6 @@ enum cvmx_usb_pipe_flags {
/* Maximum number of pipes that can be open at once */
#define MAX_PIPES 32
-/* Maximum number of outstanding transactions across all pipes */
-#define MAX_TRANSACTIONS 256
-
/* Maximum number of hardware channels supported by the USB block */
#define MAX_CHANNELS 8
@@ -284,10 +281,6 @@ enum cvmx_usb_pipe_flags {
*/
#define MAX_TRANSFER_PACKETS ((1<<10)-1)
-enum cvmx_usb_transaction_flags {
- __CVMX_USB_TRANSACTION_FLAGS_IN_USE = 1<<16,
-};
-
enum {
USB_CLOCK_TYPE_REF_12,
USB_CLOCK_TYPE_REF_24,
@@ -339,7 +332,6 @@ struct cvmx_usb_transaction {
struct cvmx_usb_transaction *prev;
struct cvmx_usb_transaction *next;
enum cvmx_usb_transfer type;
- enum cvmx_usb_transaction_flags flags;
uint64_t buffer;
int buffer_length;
uint64_t control_header;
@@ -434,10 +426,7 @@ struct cvmx_usb_tx_fifo {
* usbcx_hprt: Stored port status so we don't need to read a CSR to
* determine splits.
* pipe_for_channel: Map channels to pipes.
- * free_transaction_head: List of free transactions head.
- * free_transaction_tail: List of free transactions tail.
* pipe: Storage for pipes.
- * transaction: Storage for transactions.
* indent: Used by debug output to indent functions.
* port_status: Last port status used for change notification.
* free_pipes: List of all pipes that are currently closed.
@@ -452,10 +441,7 @@ struct cvmx_usb_state {
int idle_hardware_channels;
union cvmx_usbcx_hprt usbcx_hprt;
struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS];
- struct cvmx_usb_transaction *free_transaction_head;
- struct cvmx_usb_transaction *free_transaction_tail;
struct cvmx_usb_pipe pipe[MAX_PIPES];
- struct cvmx_usb_transaction transaction[MAX_TRANSACTIONS];
int indent;
struct cvmx_usb_port_status port_status;
struct cvmx_usb_pipe_list free_pipes;
@@ -652,54 +638,6 @@ static int cvmx_usb_get_num_ports(void)
return arch_ports;
}
-
-/**
- * Allocate a usb transaction for use
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: Transaction or NULL
- */
-static inline struct cvmx_usb_transaction *__cvmx_usb_alloc_transaction(struct cvmx_usb_state *usb)
-{
- struct cvmx_usb_transaction *t;
- t = usb->free_transaction_head;
- if (t) {
- usb->free_transaction_head = t->next;
- if (!usb->free_transaction_head)
- usb->free_transaction_tail = NULL;
- }
- if (t) {
- memset(t, 0, sizeof(*t));
- t->flags = __CVMX_USB_TRANSACTION_FLAGS_IN_USE;
- }
- return t;
-}
-
-
-/**
- * Free a usb transaction
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @transaction:
- * Transaction to free
- */
-static inline void __cvmx_usb_free_transaction(struct cvmx_usb_state *usb,
- struct cvmx_usb_transaction *transaction)
-{
- transaction->flags = 0;
- transaction->prev = NULL;
- transaction->next = NULL;
- if (usb->free_transaction_tail)
- usb->free_transaction_tail->next = transaction;
- else
- usb->free_transaction_head = transaction;
- usb->free_transaction_tail = transaction;
-}
-
-
/**
* Add a pipe to the tail of a list
* @list: List to add pipe to
@@ -802,11 +740,6 @@ static int cvmx_usb_initialize(struct cvmx_usb_state *usb,
int i;
usb->index = usb_port_number;
- /* Initialize the transaction double linked list */
- usb->free_transaction_head = NULL;
- usb->free_transaction_tail = NULL;
- for (i = 0; i < MAX_TRANSACTIONS; i++)
- __cvmx_usb_free_transaction(usb, usb->transaction + i);
for (i = 0; i < MAX_PIPES; i++)
__cvmx_usb_append_pipe(&usb->free_pipes, usb->pipe + i);
}
@@ -2263,7 +2196,7 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
transaction,
transaction->actual_bytes,
transaction->urb);
- __cvmx_usb_free_transaction(usb, transaction);
+ kfree(transaction);
done:
return;
}
@@ -2310,7 +2243,7 @@ static struct cvmx_usb_transaction *__cvmx_usb_submit_transaction(struct cvmx_us
if (unlikely(pipe->transfer_type != type))
return NULL;
- transaction = __cvmx_usb_alloc_transaction(usb);
+ transaction = kzalloc(sizeof(*transaction), GFP_ATOMIC);
if (unlikely(!transaction))
return NULL;
@@ -2480,10 +2413,6 @@ static int cvmx_usb_cancel(struct cvmx_usb_state *usb,
if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
return -EINVAL;
- /* Fail if this transaction already completed */
- if (unlikely((transaction->flags & __CVMX_USB_TRANSACTION_FLAGS_IN_USE) == 0))
- return -EINVAL;
-
/*
* If the transaction is the HEAD of the queue and scheduled. We need to
* treat it special

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