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Message-ID: <4B59F501.6010607@gmail.com>
Date: Fri, 22 Jan 2010 19:57:05 +0100
From: Roel Kluin <roel.kluin@...il.com>
To: Russell King <linux@....linux.org.uk>,
linux-arm-kernel@...ts.infradead.org,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] mach-pnx4008/dma.c: clean up duplication in pnx4008_dma_split_{head,ll}_entry()
It appears unnecessary to duplicate these loops.
Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
arch/arm/mach-pnx4008/dma.c | 198 +++++++++++++++----------------------------
1 files changed, 67 insertions(+), 131 deletions(-)
diff --git a/arch/arm/mach-pnx4008/dma.c b/arch/arm/mach-pnx4008/dma.c
index 425f718..d9302d3 100644
--- a/arch/arm/mach-pnx4008/dma.c
+++ b/arch/arm/mach-pnx4008/dma.c
@@ -731,78 +731,46 @@ void pnx4008_dma_split_head_entry(struct pnx4008_dma_config * config,
}
if (num_entries != 0) {
struct pnx4008_dma_ll *ll = NULL;
+ struct pnx4008_dma_ll *ll_old;
+ unsigned long ll_dma_old;
config->ch_ctrl &= ~0x7ff;
config->ch_ctrl |= new_len;
- if (!config->is_ll) {
- config->is_ll = 1;
- while (num_entries) {
- if (!ll) {
- config->ll =
- pnx4008_alloc_ll_entry(&config->
- ll_dma);
- ll = config->ll;
- } else {
- ll->next =
- pnx4008_alloc_ll_entry(&ll->
- next_dma);
- ll = ll->next;
- }
-
- if (ctrl->si)
- ll->src_addr =
- config->src_addr +
- src_width * new_len * count;
- else
- ll->src_addr = config->src_addr;
- if (ctrl->di)
- ll->dest_addr =
- config->dest_addr +
- dest_width * new_len * count;
- else
- ll->dest_addr = config->dest_addr;
- ll->ch_ctrl = config->ch_ctrl & 0x7fffffff;
- ll->next_dma = 0;
- ll->next = NULL;
- num_entries--;
- count++;
- }
- } else {
- struct pnx4008_dma_ll *ll_old = config->ll;
- unsigned long ll_dma_old = config->ll_dma;
- while (num_entries) {
- if (!ll) {
- config->ll =
- pnx4008_alloc_ll_entry(&config->
- ll_dma);
- ll = config->ll;
- } else {
- ll->next =
- pnx4008_alloc_ll_entry(&ll->
- next_dma);
- ll = ll->next;
- }
-
- if (ctrl->si)
- ll->src_addr =
- config->src_addr +
- src_width * new_len * count;
- else
- ll->src_addr = config->src_addr;
- if (ctrl->di)
- ll->dest_addr =
- config->dest_addr +
- dest_width * new_len * count;
- else
- ll->dest_addr = config->dest_addr;
- ll->ch_ctrl = config->ch_ctrl & 0x7fffffff;
- ll->next_dma = 0;
- ll->next = NULL;
- num_entries--;
- count++;
+ if (config->is_ll) {
+ ll_old = config->ll;
+ config->ll_dma;
+ }
+ while (num_entries) {
+ if (!ll) {
+ config->ll = pnx4008_alloc_ll_entry(
+ &config->ll_dma);
+ ll = config->ll;
+ } else {
+ ll->next = pnx4008_alloc_ll_entry(
+ &ll-> next_dma);
+ ll = ll->next;
}
+
+ if (ctrl->si)
+ ll->src_addr = config->src_addr +
+ src_width * new_len * count;
+ else
+ ll->src_addr = config->src_addr;
+ if (ctrl->di)
+ ll->dest_addr = config->dest_addr +
+ dest_width * new_len * count;
+ else
+ ll->dest_addr = config->dest_addr;
+ ll->ch_ctrl = config->ch_ctrl & 0x7fffffff;
+ ll->next_dma = 0;
+ ll->next = NULL;
+ num_entries--;
+ count++;
+ }
+ if (config->is_ll) {
ll->next_dma = ll_dma_old;
ll->next = ll_old;
}
+ config->is_ll = 1;
/* adjust last length/tc */
ll->ch_ctrl = config->ch_ctrl & (~0x7ff);
ll->ch_ctrl |= old_len - new_len * (count - 1);
@@ -853,75 +821,43 @@ void pnx4008_dma_split_ll_entry(struct pnx4008_dma_ll * cur_ll,
}
if (num_entries != 0) {
struct pnx4008_dma_ll *ll = NULL;
+ struct pnx4008_dma_ll *ll_old;
+ unsigned long ll_dma_old;
cur_ll->ch_ctrl &= ~0x7ff;
cur_ll->ch_ctrl |= new_len;
- if (!cur_ll->next) {
- while (num_entries) {
- if (!ll) {
- cur_ll->next =
- pnx4008_alloc_ll_entry(&cur_ll->
- next_dma);
- ll = cur_ll->next;
- } else {
- ll->next =
- pnx4008_alloc_ll_entry(&ll->
- next_dma);
- ll = ll->next;
- }
-
- if (ctrl->si)
- ll->src_addr =
- cur_ll->src_addr +
- src_width * new_len * count;
- else
- ll->src_addr = cur_ll->src_addr;
- if (ctrl->di)
- ll->dest_addr =
- cur_ll->dest_addr +
- dest_width * new_len * count;
- else
- ll->dest_addr = cur_ll->dest_addr;
- ll->ch_ctrl = cur_ll->ch_ctrl & 0x7fffffff;
- ll->next_dma = 0;
- ll->next = NULL;
- num_entries--;
- count++;
- }
- } else {
- struct pnx4008_dma_ll *ll_old = cur_ll->next;
- unsigned long ll_dma_old = cur_ll->next_dma;
- while (num_entries) {
- if (!ll) {
- cur_ll->next =
- pnx4008_alloc_ll_entry(&cur_ll->
- next_dma);
- ll = cur_ll->next;
- } else {
- ll->next =
- pnx4008_alloc_ll_entry(&ll->
- next_dma);
- ll = ll->next;
- }
-
- if (ctrl->si)
- ll->src_addr =
- cur_ll->src_addr +
- src_width * new_len * count;
- else
- ll->src_addr = cur_ll->src_addr;
- if (ctrl->di)
- ll->dest_addr =
- cur_ll->dest_addr +
- dest_width * new_len * count;
- else
- ll->dest_addr = cur_ll->dest_addr;
- ll->ch_ctrl = cur_ll->ch_ctrl & 0x7fffffff;
- ll->next_dma = 0;
- ll->next = NULL;
- num_entries--;
- count++;
+
+ if (cur_ll->next) {
+ ll_old = cur_ll->next;
+ ll_dma_old = cur_ll->next_dma;
+ }
+ while (num_entries) {
+ if (!ll) {
+ cur_ll->next = pnx4008_alloc_ll_entry(
+ &cur_ll->next_dma);
+ ll = cur_ll->next;
+ } else {
+ ll->next = pnx4008_alloc_ll_entry(
+ &ll->next_dma);
+ ll = ll->next;
}
+ if (ctrl->si)
+ ll->src_addr = cur_ll->src_addr +
+ src_width * new_len * count;
+ else
+ ll->src_addr = cur_ll->src_addr;
+ if (ctrl->di)
+ ll->dest_addr = cur_ll->dest_addr +
+ dest_width * new_len * count;
+ else
+ ll->dest_addr = cur_ll->dest_addr;
+ ll->ch_ctrl = cur_ll->ch_ctrl & 0x7fffffff;
+ ll->next_dma = 0;
+ ll->next = NULL;
+ num_entries--;
+ count++;
+ }
+ if (cur_ll->next) {
ll->next_dma = ll_dma_old;
ll->next = ll_old;
}
--
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